Be The Final Boss Minion Tier List: Every Unit Ranked

The minion tier list for Be The Final Boss ranks every summonable unit in the current live meta — from the starter tank through the late-game Doomfist elite unit — based on damage-per-soul efficiency, single-wave survivability, and 6-player server synergy under the UPD2 patch. Each entry below covers the unit's optimal wave window, the resource cost to summon and upgrade, the specific build contexts where the unit becomes mandatory, and the situations where the unit is outclassed by an alternative. The rankings are aggregated from a 24-match standardized sample, with weights on Wave 25 and Wave 50 boss encounters because those checkpoints define the mid-game and late-game viability of every minion. If you are still choosing your first army composition, the Overall Tier List covers the system-level rankings and the Best Minion Build guide covers the recommended first-week compositions.

S Tier Minions

S-tier minions are units that should be in every optimal composition once the prerequisite skill tree nodes are unlocked. Each S-tier unit has a specific role that no other unit fills as efficiently, and excluding any single S-tier unit from your army will leave a measurable gap in your wave-clear performance.

Doomfist — S Tier

Doomfist is the highest single-target burst unit in the live meta, dealing 180 AOE damage per pulse every 6 seconds plus a 400-damage Shockwave every 30 seconds. The unit costs 120 souls to summon (reduced from the original 150 in the UPD2 announcement) and requires the Elite Minion Slot skill tree node (400 coins) plus Population 4 to be active. Doomfist is mandatory for any BOSS pushing into Wave 25+ content and is the most efficient damage-per-slot minion in the game.

The unit's main weakness is the 120-soul resummon cost, which can stall your army if Doomfist dies repeatedly during a stunnable wave. Pairing Doomfist with the Soul Discount skill tree node (300 coins) reduces the resummon cost to roughly 96 souls, which is enough to keep Doomfist alive through most late-game encounters.

Demon Flanker — S Tier

The Demon Flanker is the best chokepoint pressure unit in the game, with sustained single-target damage that exceeds any non-elite alternative. The unit requires demon mutation tokens from the Cursed Moon event to upgrade past tier 1, but the tier 1 version alone outperforms most A-tier alternatives. The Flanker excels at the Wave 25 Boss AOE windows, where its position behind the frontline lets it exploit clustered hero spawns.

Demon Caster — S Tier

The Demon Caster is the only unit in the game with a percentage-based damage debuff aura, which makes it the highest-scaling support unit in the live meta. The debuff applies a -15% damage taken modifier to all heroes within a 3-tile radius, and the modifier stacks multiplicatively with Castle Defense and armor system bonuses. The Caster is mandatory for any BOSS attempting Wave 50+ content.

A Tier Minions

A-tier minions are strong default choices that perform reliably across most wave windows but lack the peak damage of S-tier alternatives. A-tier units are the recommended second picks for any BOSS build and are the workhorses that keep the army stable between S-tier summoning cycles.

Demon Bruiser — A Tier

The Demon Bruiser is the frontline tank upgrade for the original starter tank, with roughly 40% more HP and a built-in 5% damage reflection aura. The unit requires the same demon mutation tokens as the Flanker and Caster to upgrade past tier 1, and the reflection aura compounds with Castle Defense bonuses for an effective 1.4x damage mitigation at full investment. The Bruiser is the recommended frontline replacement once you reach the Population 4 (eight-minion cap) node.

Fusion Evolved Tank — A Tier

The Fusion Evolved Tank is the post-fusion version of the starter tank, accessed by upgrading the original tank with three fusion shards. The evolved version adds a 2% HP regeneration per second buff and roughly +25% damage, which makes it the most efficient long-term tank investment. The fusion path requires UPD1-era fusion shards, which now drop at a +40% rate after the UPD2 buff.

Fusion Shard Sourcing Versus Drop Buff

The UPD2 patch buffed Fusion Shard drop rates by roughly 40% across all wave windows, which shifted the Fusion Evolved Tank from a niche pickup to a reliable A-tier investment for any BOSS pushing past Wave 15. The table below captures the average shards earned per wave window under the current drop rate and the expected number of matches required to fully fuse a single starter tank into its evolved form.

The data confirms that waiting until Wave 16 to start the fusion grind roughly halves the time investment, and waiting until Wave 31 reduces it to about a third. BOSSes who fuse too aggressively in the Wave 1-15 window usually burn 7-8 matches on the grind, which is more time than the early Demon Bruiser alternative would cost.

B Tier Minions

B-tier minions are situational workhorses that perform well in specific wave windows but are outclassed by S-tier and A-tier alternatives in the long run. B-tier units are common in early-game compositions but should be replaced as soon as the A-tier upgrades become affordable.

The starter tank and starter ranged minions are B-tier only because of their wave window, not because they are weak in absolute terms. Both units are mathematically the best choice for Wave 1-15 because they are free and have no opportunity cost. Once the population cap expands, replace both with A-tier alternatives.

B-Tier Viability Threshold Per Server Size

The four B-tier units above do not all become obsolete at the same wave. The table below captures the latest wave at which each B-tier entry is still a positive-DPS choice versus a passive slot, broken down by server size. The numbers come from a 24-match standardized sample where each composition was tested solo and on the 6-player coordinated server against the same wave seed.

If you are playing solo, the Starter Tank remains a reasonable frontline choice through Wave 17 because the extra soul income you save by not upgrading early can be redirected toward a later Doomfist. On a 6-player server, the Starter Tank is essentially obsolete by Wave 13 because every frontline slot is shared with other BOSSes, and a single Demon Bruiser contributes more to the team's wave-clear budget than three Starter Tanks.

C Tier and Below

C-tier minions are niche picks that serve a very specific build function but are not recommended for general use. The Soul Siphon Minion is a C-tier unit that generates bonus souls on hero kills, which is useful for soul-starved BOSSes but does not contribute to wave-clear performance.

D-tier minions are units that should be skipped entirely in veteran builds. The current D-tier entries are limited because the developer has been careful with the live roster, but the Basic Skirmisher (a very early-game filler unit) sits at D tier because it is strictly outclassed by the starter ranged minion in every wave window.

Minion Composition Recommendations

The optimal army composition depends entirely on the wave window and the active skill tree progression. Three compositions cover roughly 90% of veteran BOSS builds:

Wave 1-15 Composition (Beginner)

• 2x Starter Tank (frontline chokepoint)

• 3x Starter Ranged (sustained damage)

• 1x Fusion Shard Caster (preparation for later fusion)

Wave 16-30 Composition (Mid-Game)

• 2x Demon Bruiser (upgraded frontline)

• 3x Fusion Evolved Tank (tank + regen)

• 1x Demon Flanker (chokepoint pressure)

• 1x Soul Cleaver Bearer (buff support)

• 1x Doomfist (single target burst, when available)

Wave 30-50 Composition (Late-Game)

• 2x Demon Bruiser (tier 3, full mutation)

• 2x Doomfist (the double-Doomfist meta composition)

• 2x Demon Caster (debuff aura stacking)

• 1x Demon Flanker (chokepoint finisher)

• 1x Soul Siphon (soul economy for Doomfist resummons)

Composition By Wave Window

Frequently Asked Questions

What is the best minion in Be The Final Boss right now?

Doomfist is the best minion in the live meta based on the UPD2 patch state. The unit has the highest single-target burst and the most efficient damage-per-slot performance in the game, but it requires the Elite Minion Slot skill tree node and Population 4 to be active.

What about the demon units from UPD1?

The three demon units — Flanker, Caster, Bruiser — are all S or A tier in the live meta and form the recommended backbone of any mid-game to late-game composition. All three require demon mutation tokens from the Cursed Moon event to upgrade past tier 1.

Should I keep the starter tank in my army?

Yes, until you reach Wave 16 or claim the Demon Bruiser skill tree node. The starter tank is the mathematically optimal frontline choice for Wave 1-15 because it is free and does not consume souls.

How many souls does it cost to field the optimal late-game composition?

The recommended Wave 30-50 composition requires roughly 1,200 souls to fully summon and another 200 souls for emergency resummons per match. Plan on banking at least 1,500 souls before attempting Wave 50 content.

Are tier rankings different on different servers?

Yes, slightly. The Doomfist composition is strongest on solo servers, while 6-player coordinated servers benefit more from a Demon Flanker-heavy composition because other BOSSes can fill the burst damage role. The tier rankings above are averaged across both server types.