Hi there! I had encountered this (possible) issue with Vengeance sims during the last xpac as well, but - I suspect that our Robot Overlord is applying a 15% damage bonus across the board during demon spikes, as opposed to a 15% physical damage bonus.
Looking at normal spirit bomb hits using this talent versus other talents, the damage always seems to sim some 5-7% higher, which fits if the sim is applying a 15% damage bonus during DS.
Yeah, that looks like a bug. I will add a physical filter to that spell. Thanks for the post.
Posts from users on the healing and tanking simulator are very helpful because we are the only people doing heal/tank simulation. Don’t hesitate to post if you ever see anything that looks off.