Ignore def doesn't stack

There's gotta be something OP about accelbot (mechanics)

I used today's AP reset and stopped adding AP once i hit 10k max range. Without using accelbot, my max hit with tank mode basic shots was 9.2k (I hit this almost exactly, never higher) on 10%PDR mobs.

Sources of ignore def: 15% on gun, 15% on codex, 20% on atomic hammer (proven to leak to work on other skills).

Clearly only the 20% ignore def from atomic hammer is kicking in... and the one on my gun is being useless.


Then I remember that I have accel bot... I give it a shot... and get mindpineapple'd:

Edit: That's me using tank mode's basic attack that deals 100% damage... so it's great for testing out range


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I hit 9975 when my max range is 10002. I even hit 9991 once, though I didn't grab the SS in time... how the hell did I hit 99.9% of my range?

20% from skill then 15% accel bot... at BEST I'd get 35% ignore if it's additive. Hell, even if accel bot MAGICALLY makes everything stack... that's 20%(atomic hammer)+15%(gun)+15%(codex)+15%(accelbot)=65% ignore additively.... theoretical max of 9650 damage... wtp's going on here?


Edit: sources of def ignore pics:

 Spoiler