Question about Defender of the Galaxy

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Dr Pippy

Second Lieutenant
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Sep 27, 2020
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The Defender of the Galaxy perk offers a sizable +50% bonus to damage against crises, and I'm curious about how that stacks with other damage bonuses (e.g. repeatables). Is it multiplicative or additive? For example, if I have 20 levels of a damage repeatable (+100%), would my total damage be increased by (1+1)*1.5=3x (i.e. additive stacking), or (1+1+0.5)=2.5x (i.e. multiplicative stacking)?

Either way seems reasonable. I've not actually tested it myself, but have generally felt like DotG hasn't packed quite as much of a punch against crisis fleets as I'd expect, so I suspect it's additive stacking. I'd be grateful to hear if anyone's figured this out!