if you have his name do this
lets say his name is <<S3xF0X>>
log on
/whereis <<S3xF0X>>
join the channel
say: Sup Doods! im gonna go backstab some Noobs! anyone want to help?
(belive it or not, with some minor coaxing you can get them to go!, they are surprisingly trusting)
whisper him in game your about ready to attack ( get 4 groups or lurkers or tanks) then move them to his base ( so you can attack togther) unallie, kill
if your not good enough to kill him (most bsers are pretty good players after all) once the games about halfway through, un allie him next to one guy. Hell un allie you..... Then RE-ALLIE! tell everyone hes bsing you! , they will scroll down and see his guy going off on your guys, and your guys just standing there. Then it becomes a 4 on1.