If you want to go all out, fine, but do it on the marked mob, if not, you get to be the tank and I'll leave. I'm not there to play a game of trash mob ping-pong with you, especially when you've apparently ran it enough to know better.
EDIT: Just got out of a run in progress (starting just before accessory chest) with some bad A's whose tank had d/c'd that were 'over'geared (possibly better than the ones I was playing ping-pong with earlier), beat the boss @69 mins remaining, they didn't have the same problems as the ones I made this thread for ;p (though me and the healer did play a bit of houndlight pong, but that was a failure on my part. And it actually died fast!) So all you folks saying 'l2tank'... just stop. It just shows that you don't know the hate mechanics as well as you think you do.