I might have to make an exception for Word of Pain. The second skill in the Word of Pain chain is Word of Agony, which just has you doing more damage. But the third skill in that chain is Death Sentence, which adds one of my obsessions in this game: it lowers resistances on enemies. At max level, it lowers pierce resistance by 25%. So I think that should be an awesome skill for any gun-user, enhancing the pierce damage that guns do to enemies. It might not be satisfying to do a debuff with almost no visual flair. But it’s pretty satisfying to blow enemies away with guns, and it looks like this skill will help you do that.