Couldnt you turn off autofollow and scripted combat movement, then maybe use botcommander to make them all AF at certain points (into the pool) and with no scripted movement they won't run back up to the queen until you need them to?
I was able a few times, when dpsing the mob to the add point, make the queen come to the top of the stairs so the next times we just sat in the pool dpsing between add phases.