heres my list of best weapon:
rapid weapons (uzi, ak47 etc.) always aim to the head, they die faster that way.
sawed shot gun - wider shots and faster reload than shot gun. aim for the legs or heads. better yet, just go crazy.
chain saw - use only for emergencies only, cause its very slow in reloading.
how to beat the game (without glitch)
USE YOUR HEAD! and use DEFENSIVE jobs like Destroyer or Guardian cause you need to live more (since 25% of your loss is from stupid AI the rest are bad strategy)
its a good game, love the voice (brit) nice ability free-setup, and the graphics good but hated the AI stupidity (but i like the assassin team mate) but some skills like that 500% speed up is not available (god like skill!!!)
 "The Last Stand 2"){kind=icon}
 "Sonny"){kind=icon}