Debuff into Shield3 combos
Guard Barrier turns a debuff you land on an enemy into a Barrier. Skills that debuff repeatedly (per tick) or hit a whole pack refresh the shield most; the Barrier only pays off on a unit that gets hit, so these are frontline combos.
Fire Cloak + Guard Barrier strongFrontline fire-mage (niche)
Fire Cloak re-applies Burning to adjacent enemies once a second, so Guard Barrier re-arms a 5%-max-HP shield once a second (per enemy) while you stand in the pack.
Fire Cloak is a self-aura: for 10s it burns every adjacent enemy each second and gives you a Barrier worth 150% of Magic Attack Power. Because Burning is a debuff applied to an enemy, each of those per-second applications also fires Guard Barrier (Barrier = 5% Max Health Total, 5s). Against a surrounding pack that is many refreshes per second, keeping a fresh shield stacked on top of Fire Cloak's own. Add Flame of Life (Burst) and every Burning application also heals you 4% of your missing health. The catch, and why this is niche rather than busted: the aura only burns ADJACENT enemies, so it needs a fire mage built to stand in melee range (Fire Battle Mage frees the weapon and you tank up front). A backline fire mage neither procs it reliably nor needs the shield.
- Fire Cloak Active applies Burning to enemy (per tick) - to every adjacent enemy, once a second for the 10s aura
- Guard Barrier Passive applies Barrier to self (per tick) - re-armed each time Fire Cloak's Burning lands, so ~once a second while enemies are adjacent
- Flame Of Life Passive grants healing to self (per tick) - optional: heals 4% of missing health per Burning application
Battle Stomp + Guard Barrier strongFrontline blunt
One stomp lands two debuffs on a whole pack, so Guard Barrier fires a burst of shields at once - a strong opener, though only every 30s.
Battle Stomp hits all nearby enemies with Disturbance and Dizziness. Both are debuffs, and each application on each enemy is a Guard Barrier trigger, so stomping into a crowd banks a wall of Barrier in one cast while blunting the pack's accuracy. It is a burst, not an engine: the 30s cooldown means you cannot keep it up, so it pairs well as the opener in front of a per-tick source like Fire Cloak, or on a Blunt frontliner who just wants a big periodic shield and some crowd control.
- Battle Stomp Active applies Disturbance to enemy (once per cast) - to all nearby enemies (30s cooldown)
- Battle Stomp Active applies Dizziness to enemy (once per cast) - to all nearby enemies
- Guard Barrier Passive applies Barrier to self (once per cast) - one trigger per debuff per enemy hit by the stomp
Flow Seeker + Guard Barrier strongMelee skill-spammer
Flow Seeker drops Exposed Flaw on the enemy every time you use a single-target melee skill, so Guard Barrier re-arms on every such cast - and the same Exposed Flaw powers the energy loop below.
Flow Seeker (Warrior) inflicts Exposed Flaw on the target whenever you use a single-target melee skill. Exposed Flaw is a debuff, so each application fires Guard Barrier. A melee unit that leans on single-target skills therefore refreshes its shield constantly just by attacking. This is the same trigger that feeds Flow Seeker + Blade Spirit, so one passive pays for both your defense (shield) and your offense (one guaranteed crit per application / energy). Both pieces are passive, so it costs no rotation effort.
- Flow Seeker Passive applies Exposed Flaw to enemy (per skill use) - every time you use a single-target melee skill
- Guard Barrier Passive applies Barrier to self (per skill use) - one trigger per Exposed Flaw application
Barrier amplifiers1 combo
These do not create the first Barrier; they multiply it, convert it to healing, or turn it into cooldown reduction. Bolt them onto a Guard Barrier or Fire Cloak engine.
Fortified + Barrier Resurge (+ Wave Cicle) strongShield tank (add-on)
None of these make a shield; they multiply it, refund it as healing, and turn shield gain into shorter cooldowns. Bolt them onto any Guard Barrier or Fire Cloak engine.
Fortified adds 20% to every Barrier you gain. Barrier Resurge heals you for 20% of every Barrier point you lose, both the Barrier that expires and the Barrier a hit uses up - so the shields a debuff engine constantly generates become a steady drip of healing. Wave Cicle (Tide) cuts 10% off the time left on every running skill cooldown when you gain a Barrier, at most once per second, so a frequent shield source (Fire Cloak, Guard Barrier) quietly accelerates your whole kit, letting you re-apply debuffs and shields faster - a self-reinforcing loop. All three are passive. On their own they do nothing; on top of a Guard Barrier build they turn debuff-into-shield into debuff-into-shield-plus-heal-plus-haste.
- Fortified Passive applies Barrier to self (always on) - +20% to all Barrier you gain
- Barrier Resurge Passive grants healing to self (on condition) - heal 20% of every Barrier point you lose, whether it expires or a hit uses it up
- Wave Cycle Passive applies Cooldown Reduction to self (on condition) - when you gain a Barrier, cuts 10% off the time left on running skill cooldowns, at most once per second
Taunt tank1 combo
Force enemies to attack you, then convert the hits you take into Barrier. Pure frontline tanking.
Taunt + Mocking Grin strongTank
Force enemies to hit you, then turn 20% of every hit you take into Barrier. The taunt is itself a debuff, so it fires Guard Barrier too.
Taunt is a debuff that forces enemies to attack the taunter. Dual Request taunts one target (and gives you +50% damage to it, -30% damage from everyone else); Guardian's Taunt taunts a whole pack. Because Taunt is an enemy debuff, casting it also triggers Guard Barrier. Then Mocking Grin (Fortress) converts 20% of every hit you take from a taunted enemy into Barrier for 10s - so the more you are attacked, the more shield you generate, exactly inverting the usual downside of being the target. Dual Request's -30% damage taken and a shield stack (Fortified / Barrier Resurge) make this a genuinely sticky tank. Mocking Grin only checks that the attacker carries Taunt, not who applied it, so a Taunt from an ally also counts.
- Duel Request Active applies Taunt to enemy (once per cast) - single target, 30s; also +50% damage to it and -30% damage from others
- Guardian's Taunt Active applies Taunt to enemy (once per cast) - whole nearby pack
- Mocking Grin Passive applies Barrier to self (per hit taken) - Barrier = 20% of each hit you take from an enemy you taunted
- Guard Barrier Passive applies Barrier to self (once per cast) - the taunt itself is a debuff, so it also fires Guard Barrier
Self-buff into Summon2 combos
A summon's stats are locked in from the summoner's Magic Attack Power at summon time. Only a Magic-Attack self-buff inflates a summon, and Become Fire is the only stacking one.
Become Fire into Summon (stat lock-in) strongSummoner mage
Become Fire stacks Magic Attack Power on yourself; a summon copies your inflated Magic Attack Power at the instant it is cast and keeps it after the buff fades, until a save is loaded.
A summon's stats are frozen from the summoner's Magic Attack Power at summon time (Bubbletoad HP = your Magic Attack Power + its base HP, its Magic Attack = half yours + its base Magic Attack; a Bubbling uses the same base values, see the Summons guide). Only Magic Attack matters, and Become Fire is the only stacking Magic-Attack self-buff in the game: each cast puts 2 Burning on you and adds 2 Become Fire stacks for 30s, each worth +12% Magic Attack Power (+24% per cast). Fireproof doubles only the self Burning, not the Become Fire stacks, and cuts the Burning damage you take by 40%. Pump Become Fire, then summon while inflated and the creature banks that power until a save is loaded (loading recomputes it from your current Magic Attack Power). Honest ceiling: with a 15s cooldown and a 30s window you realistically keep 2 or 3 casts running (about +48% to +72% Magic Attack Power), far below the 99-stack cap of Become Fire - a real but modest boost that stays on the summon for the session, but it takes real setup and three trees of investment. Fire Battle Mage lets you cast Become Fire with no fire staff, so you hold the water staff the summons need the whole time (a water staff grants Summon Bubbling for free; Bubbletoad needs the Water Magic tree).
- Become Fire Active applies Burning to self (once per cast) - 2 Burning on yourself per cast (doubled by Fireproof) plus 2 Become Fire stacks for 30s, each +12% Magic Attack Power
- Summon: Bubble Toad Active grants a summon to self (once per cast) - locks in HP = your Magic Attack Power + base HP and Magic Attack = 0.5 x your Magic Attack Power + base Magic Attack at summon time
Summon spam + Ebb and Flow + Extra Bubble situationalSummoner
Bubblings explode on death, which grants you cooldown reduction (Ebb and Flow), which lets you resummon sooner - a self-feeding tempo loop.
Bubblings die readily (they explode on death for damage plus an ally Barrier). Ebb and Flow (Tide) grants cooldown reduction whenever a unit or structure you summoned is destroyed, so a summoner who churns through Bubblings keeps their cooldowns short and can keep the board full; Extra Bubble adds a 4%-per-skill chance of a free extra Bubbling. It is tempo, not raw power - situational, and it competes with the Become Fire lock-in for your Water tree slots - but it keeps the explode-on-death Barriers flowing to your line.
- Ebb and Flow Passive applies Cooldown Reduction to self (on condition) - when a unit or structure you summoned is destroyed
- Extra Bubble Passive grants a summon to self (on condition) - 4% chance per skill use to summon an extra Bubbling
Energy loops3 combos
Blade Spirit is the only on-hit energy source in the game (+1 energy per melee physical crit from a skill; basic attacks never trigger it). Each Exposed Flaw stack on the target guarantees one crit, so Exposed Flaw sources lower the energy cost of your skills.
Flow Seeker + Blade Spirit bustedMelee
Flow Seeker's Exposed Flaw makes your next hit on the target a guaranteed crit; Blade Spirit refunds energy on every melee skill crit - the only on-hit energy source in the game. Your skills cost less energy over a fight.
Blade Spirit is the only on-hit energy source in Dungeon Settlers: +1 energy each time a skill (not a basic attack) lands a melee physical critical hit. Energy Regeneration still ticks once a second on its own. On its own Blade Spirit depends on your crit chance; paired with Flow Seeker's Exposed Flaw (each stack makes one hit on the target a guaranteed crit, and Flow Seeker gives 1 stack per single-target melee skill) it gets at least one sure crit per such skill. So a melee unit with both Warrior passives gets a steady energy refund on top of its normal crits, and - since Exposed Flaw is a debuff - also re-arming Guard Barrier if it has it. Both are passive and cheap to slot, which is why this is the backbone of every strong melee build rather than a niche gimmick.
- Flow Seeker Passive applies Exposed Flaw to enemy (per skill use) - guarantees crits against that enemy
- Blade Spirit Passive grants energy to self (per hit) - +1 energy per melee physical critical hit from a skill (basic attacks never trigger it)
Chain Slash + Flow Seeker + Blade Spirit strongSword melee
Chain Slash's first hit is a sure crit under Exposed Flaw and its other three crit on your crit chance, so Blade Spirit refunds 1 to 4 energy against its 3-energy cost.
Chain Slash strikes a single target four times for 100% Physical Attack Power each, costing 3 energy (12s cooldown). It is itself a single-target melee skill, so it triggers Flow Seeker's Exposed Flaw. One Exposed Flaw stack covers one hit, so the first hit is a guaranteed crit and the other three crit only on your crit chance. Blade Spirit refunds 1 energy per crit, so 1 energy is sure and up to 4 come back for a 3-energy spend. It becomes energy-positive only with high crit chance, and it re-arms Guard Barrier through the Exposed Flaw.
- Flow Seeker Passive applies Exposed Flaw to enemy (per skill use) - Chain Slash is a single-target melee skill, so using it applies Exposed Flaw
- Blade Spirit Passive grants energy to self (per hit) - the first of Chain Slash's 4 hits uses the Exposed Flaw stack and is a sure crit (+1 energy); the other 3 crit only on your crit chance
Deadly Fear + Blade Spirit strongGreatsword melee
Deadly Fear puts Exposed Flaw on the ENEMY, so your next three hits on it are guaranteed crits and Blade Spirit refunds energy - the correct greatsword Exposed-Flaw setup (Slay would only expose yourself).
Unlike Slay (which grants Exposed Flaw to yourself), Deadly Fear applies Exposed Flaw and Slow to the enemy. Deadly Fear gives 3 stacks, so your next three hits on that target are guaranteed crits, feeding Blade Spirit's energy refund and Guard Barrier's shield. It is a setup, not an engine - a 15s cooldown, so you use it to mark a priority target rather than spam it - which is why it is strong rather than busted. On a greatsword unit without the Warrior tree, Deadly Fear is still worth it for the guaranteed-crit window alone.
- Deadly Fear Active applies Exposed Flaw to enemy (once per cast) - plus Slow; 15s cooldown
- Blade Spirit Passive grants energy to self (per hit) - your melee crits on the marked enemy refund energy
Burn engine1 combo
Spread Burning, amplify every hit against burning targets, then detonate the stacks. A ranged damage package that does not lean on shields.
Blazing Echo + Ignition into Incinerate strongRanged fire-mage
Spread Burning across a whole pack, let Ignition tax them for having it, then detonate the stacks for a burst that scales with how much Burning you piled on.
Blazing Echo seeds 2 Burning on the target and bounces up to 8 more times to nearby enemies, so one cast burns up to nine targets (Fireproof only doubles Burning that lands on its holder, so it does not grow the burn you spread). Ignition then adds 8% damage per Burning stack to every hit you land on a burning target, so the burn you spread quietly multiplies all your damage. Explosion adds a second seeding tool: 400% Magic Attack Power to everything in its area and 5 Burning for 10 s on each target (it can hit allies, so mind your own line); since DS_B.0.4.17 it no longer scales with the stacks. Then you cash the stacks in: Incinerate deals 300% Magic Attack Power plus stacks x30% and resets them. This is a ranged damage package - it does not want or need shields, which is why it lives on a backline mage rather than a Guard Barrier frontliner.
- BlazingEcho Active applies Burning to enemy (per hit) - 2 stacks on the target, then bounces up to 8 more times to nearby enemies
- Ignition Passive grants bonus damage to enemy (always on) - +8% damage per Burning stack on the target you hit
- Incinerate Active grants a detonation to enemy (once per cast) - 300% Magic Attack Power + stacks x30%, then resets the stacks
- Explosion Active applies Burning to enemy (once per cast) - 400% Magic Attack Power to the area and 5 Burning for 10 s on everything hit (friendly fire) - a second stack source since DS_B.0.4.17, no longer a detonator
Corrections & myths
Combos that look like synergies but are not, once you check the data - kept here so they do not get re-suggested.
Slay is NOT a debuff/shield synergy
Slay (Greatsword) grants Exposed Flaw to the CASTER, not the enemy (the in-game skill text reads 'grants you Exposed Flaw'). It is a self-malus - a 500%-Physical-Attack-Power nuke that briefly makes YOU undodgeable and guarantees crits against YOU for 1s (the cost of the huge hit; killing with it cuts its cooldown 70%). It does not trigger Guard Barrier (no enemy debuff) and it does not enable Blade Spirit (it does not make your hits crit). Use Deadly Fear for the greatsword Exposed-Flaw setup instead.
Glacier Drop is a weak Guard Barrier engine
Its frozen pillar text does say it applies Disturbance to adjacent enemies every second, but: the pillar is a spawned object whose lifetime is not in the skill data (the skill's own Duration is 0), each cast consumes a Bubbling, it is cast by a backline ranged water mage who rarely needs a shield, and it is unconfirmed whether the pillar's applications are credited to you for Guard Barrier's 'you inflict' check. Treat it as situational at best, not a per-second shield engine like Fire Cloak (a self-aura you stand in and clearly own).