this is a PvP (tombs) strategy.. so you need 8 players to do this..and to let it work the may no noobz be evolved!!
u need: 6 rangers, 1 necro and 1 monk.
what kinda skills the rangers take doesn't really matter u only gotta have this:
marksmans ship 12+3+1, punishing shot, savage shot, read the wind and FW(only one ranger has to take FW).
what the necro takes also doesn't really matter, but he has to take: order of pain or order of the vampire...
and for the monk: it really doesn't matter what he takes.. but it better be healing.
now this is how it works: first all rangers gather near the leader and the leader targets a enemy... than the necro throws up order of pain or order of the vampire and when he did that every1 shoots... so there is no count down... in that way you can kill... if they don't rez. a whole team in 40 secs.. but that is almoste impossible

but anyway u should try it.. it gives a really good feeling when it works..