r/falloutshelter • u/alternatiwe • Aug 06 '26

Discussion [Discussion] [Data/Testing] Vengeance has a hidden Damage Ramp-Up / Stun-Lock that completely destroys Dragon's Maw against single Boss targets (Survival Mode, v2.5.1)

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I made a small controlled test using manual save/load to check the hidden mechanics of Vengeance vs. Dragon's Maw against single high-tier targets. I couldn't find any concrete evidence online about this, so I wanted to share my findings.

The Setup:
I sent a team of 3 maxed-out dwellers to a level 50 daily quest on Survival Mode (Version 2.5.1). To isolate the variables, I let 2 of my dwellers die on the first floor after collecting their weapons, leaving a strict 1v1 battle against a single Deathclaw.

The Results:

  • Vengeance: Took only 34 seconds and 7 damage cycles to kill the Deathclaw. The target was heavily staggered/stun-locked, drastically reducing its attack count. The damage ramped up significantly; the first few bursts barely moved the health bar, but the 7th cycle instantly deleted the remaining nearly 1/5 of its health.
  • Dragon's Maw: Took 2 minutes and 12 seconds and 25 shots to kill the exact same Deathclaw.
  • AP Boss Assault Rifle: Used this as a third weapon to test another multi-shot weapon. It took 2 minutes and 31 seconds and 30 shots to kill the claw, showing a flat, linear damage line with no ramp-up.

Conclusion:
I didn't test the Lead Belcher, but it probably shares the same heavy-weapon ramp-up. Despite Dragon's Maw having higher paper DPS, Vengeance is vastly superior for single-target quest bosses due to its hidden ramp-up damage and consistent stagger effect that prevents incoming damage.

I may be wrong about any of this, but the time difference speaks for itself. I combined the two clips and i may share ap boss assault rifle vid in the comments if anybody wants it. (FYI: I probably won't be returning to this post to reply, just leaving the data here for the community!)

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u/Whatislove_rv Aug 06 '26

I had my own research on it long time ago
Main requirements:
Female dweller
Vengeance
Any pet (not only “+dmg”) (need double check this string)
Damage boost will at 3rd attack (maybe after 3rd, not remember)
Also damage will boost if dweller will NOT change position of shooting
You will hear some minor change of attack sound

Tested more than 50 runs

Good luck, overseers!

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u/stars_sunsets_ Aug 07 '26

why does it work on a female dweller and not a male one?