Ok, am I missing something? My stats are all maxed, and as far as I can tell, the fourth enemy in the last level (Act 3 Mission 4), the guy with the blue symbol on his chest, is still completely impossible to beat. I need Flash Bang for defensive enemies and Precise Attack for the guy I can't beat, leaving only one skill slot in question and therefore not a lot of strategic options. Obviously some people have beaten this as some of the comments mention survival mode, so someone please help. Am I missing some better weapons or a way to upgrade these crappy skills or something?