What is your experience with pures in the rev caves? I'm curious why you think a pure team should try to claim the rev caves.
Bigger pure clans really only care if rival clan(s) are pking in the revanent caves. Otherwise, it's just a regular, unofficial event that happens throughout the week. IMO it's just a money making activity for pure clans. There's too much ragging, med levels, 1-iteming, etc. for teams to take the caves as a serious battleground.