So, I've been playing around with a weird wizard Arcane Archer build that does almost all of its damage from weapon imbues, and I've noticed something really annoying in reaper difficulty. For some reason, when an enemy has even a TINY bit of energy resistance, the reaper damage reduction pretty much universally reduces the proc damage to 0. So, if I'm, say, fighting Orthons, who have some acid resistance, my 500 damage acid procs are being reduced to ZERO by their energy resistance unless I hit them with some kind of vulnerability like a hold spell.
This calculation is screwy. If my acid SPELLS are doing 90% damage then my weapon imbues/procs should also be doing about 90% damage. Their resistance shouldn't go from 10% to VIRTUAL IMMUNITY by changing from Elite to Reaper 1. I mean, yeah, if my weapon procs were around 30 damage that'd be different, but they do 200-500 damage. That's well beyond the range where any resistance should reduce them to ZERO.
Here's a video so you can see what I mean: