S-TIER | BUILD MERCENAIRE FLOOR IS LAVA (@josiahyeet) | SAISON 5

Build Video

Build Overview

This Mercenary Floor is Lava build relies on the combination of Flameblast / Oil Grenade on a Gemling Legionnaire, with an original twist: elemental ailments (the ignite from Flameblast) automatically trigger Tornado, which then spreads the ignite to nearby enemies. The result is an extremely zoomy build that’s comfortable to play, chaining casts without having to manually manage each skill.

This « mid-budget » version (around 6 divines) sits just before an eventual move to an even more advanced setup, and fixes the three main weaknesses of earlier iterations: movement speed, mana management, and survivability. Mana is now preserved because Tornado is no longer cast continuously but only during ignites, while Mobility now comes from the dedicated support gem. On the defensive side, the build combines a unique chest piece granting up to 400% increased Armour/Evasion/Energy Shield, Blasphemy + Temporal Chains, and Arctic Armour for a very tanky result despite its low budget.

The most technical part of the build concerns ignited ground maps: Tornado is normally unable to be used there because it spreads the wrong type of ignited ground. Thanks to a specific mod on Loreweave that spreads the ignite directly, the build can now kill flying monsters (mosquitoes, wasps) without needing Tornado, which unlocks all game content without exception.

Strengths / Weaknesses

Skill Gem Setup by Step

This build offers 1 progression step from leveling to the final build. Select a step to see the corresponding gem setup.

Default

Default

7 skills • 29 gemmes

Virtuous BarrierVirtuous Barrier

Déclenchement lors d'Altérations élémentairesCast on Elemental Ailment

TornadeTornado

ConflagrationSet 1Flameblast

Grenade à huileSet 2Oil Grenade

Reliquats de ManaMana Remnants

Armure arctiqueArctic Armour

Recommended Equipment

• Chest: Morior Invictus — the centerpiece of the build’s defense. Grants up to 400% increased Armour, Evasion, and Energy Shield, with 4 hidden socket slots (Greater Body Rune + Rabbit Idol in this setup)
• Belt: Ingenuity — reduces charm charges gained/used and increases the bonuses granted by each of the two equipped rings by 26%
• Amulet: rare with 19% rarity, +30 dexterity, max life, +3 to level of all spell skills, and 25% additional spell damage while energy shield is full
• Helmet: rare with Greater Desert Runes — armour/evasion, max life, max mana, rarity, cold and lightning resistances
• Gloves: rare with Greater Desert Runes — added lightning damage, accuracy, max life, rarity, chaos resistance, and a portion of armour that also applies to elemental damage
• Boots: rare with a Greater Ice Rune — movement speed, evasion rating, rarity, chaos resistance, and max life
• Rings (x2): rare, priority on max life, rarity, and elemental resistances (one ring also grants mana regeneration, the other added lightning damage)
• Weapon Set 1 (Staff): rare Pyrophyte Staff — strong fire damage scaling (+56% extra damage, +109% increased, +7 to level of fire spells), mana per enemy killed, and spell damage per 100 max life
• Weapon Set 2 (Crossbow): rare Gemini Crossbow — added cold and lightning damage, +5 to level of all projectile skills, mana per enemy killed
• Charm: Nascent Hope — triggers automatically on Freeze, chance to gain a charge on each enemy killed, and starts energy shield recharge as soon as it activates
• Jewel: From Nothing — allows allocating passives within its radius without being connected to the rest of the tree, useful for reaching isolated clusters like Burnout

Gameplay Tips

• Burning ground maps: simply disable Tornado (replace it with a harmless low-level spell like Entangle) if you don’t have an ignite-propagation mod on your chest piece — Tornado spreads the wrong type of burning ground and can brick the map
• Mana management: let the automatic trigger handle Tornado instead of casting it manually and continuously — this avoids draining your entire mana pool
• Bosses and tough packs: replace Temporal Chains with Elemental Weakness on Blasphemy for more demanding content
• Jewels: don’t feel obligated to copy the author’s setup exactly — a generic jewel or even no jewel at all already lets you test the build before investing
• Armour bases: thanks to keystone Iron Reflexes on the tree, there’s no need to buy pure armour bases — cheaper evasion bases work just as well
• Burnout node: allocate Megalomaniac/Burnout on the tree to free yourself from about twenty travel nodes and reinvest directly into tankiness

Why this Mercenary Floor is Lava build works

The heart of the build relies on a cascading trigger chain: Flameblast inflicts an ignite (an elemental ailment), which automatically triggers Tornado via the trigger link, and Tornado then spreads that ignite along its entire path. The result is near-automatic clear speed, without having to manually manage Tornado on top of your two main skills. This is what makes this Mercenary floor is lava build so comfortable to play despite its modest budget.

Movement Speed and Mana Management

Historically, this type of build suffered from two problems: slow mapping and overly heavy mana consumption. The solution used here is to let the automatic trigger handle Tornado instead of repeated manual casting: the spell only triggers on each ignite inflicted, which drastically reduces mana expenditure while maintaining good area coverage. Movement speed, meanwhile, comes directly from the gear (30% increased on the boots) and from the Mobility support gem, which directly improves overall gameplay fluidity.

Defensive layers: how this build stays tanky

The build’s survivability relies on several stacked layers rather than a single statistic. Temporal Chains (via Blasphemy) slows every enemy nearby, giving you a comfortable reaction window before a monster can finish its attack animation. Arctic Armour, boosted to 45% quality, grants over 300% additional cumulative armour across its seven stages — the equivalent of dozens of passive tree nodes invested in armour alone. Finally, the chest piece Morior Invictus multiplies all three defensive stats (Armour, Evasion, Energy Shield) by up to +400%, which massively amplifies the effect of every other layer already mentioned.

Unlocking Ignited Ground maps

On earlier versions of this build, Ignited Ground maps were unplayable: Tornado can’t be used there because it spreads the wrong type of ignited ground, which prevents killing flying monsters (mosquitoes, wasps) that don’t die from contact with regular ignited ground. The fix is to get a specific ignite-propagation mod on a chest armour piece, which makes ignite spread directly from players to nearby enemies without going through Tornado. If you don’t have it yet, simply temporarily disable Tornado (by swapping it for any other skill) on this map type to avoid bricking it.

Skill Tree