Use glitches and AR... Duh!
Haha nah. Noob's tactic. Apparently someone didn't realize this was a joke and gave me bad karma for it. Didn't even have the balls to leave their name.
Some tips. Hmm... All I can say is do your best and when you know there's an imp abuser, the safest way to go is alt (not abuse) and watch the direction the beam comes from. If you shoot him, he'll most likely move and have to re-aim.