Hello there Ok i here to solve your problem about skill dont damage bosses or high level enemy. First you have to know, basic hit duplicate you damage soo if you basic hit to much and active a skill the dmg will be 99999 and the game dont alot that so the life come back, what you have to do in is just skill. The best way to kill bosses is with combos dont basic attack then just use the skill combo. If you dont want to get into combo just get snipe and power charge and destroy his butt with snipe only hahaha