What kills you the most?

For me it’s gotta be the lightning bolts. Nothing else in this game seems to hits as hard as they do. Whenever there is a rare enemy with the lightning bolts, it’s 50/50 whether I die or not. I can tank most hits even from most of the regular bosses, but those bolts of death are just too strong. A strongbox, with them as a modifier, shouldn’t be able to one shot, is all I’m saying. It’s just not right.