Survival has group 6 mobs, and Pure Strategy doesn't, which is why are doing this build. It's the only map in the game that has this issue.
Party: 1 summoner with huntress/app pets at Hint 1, 2 summoners with huntree/monk pets at hint 5 and hint 5, 1 summoner DPS/Roamer to grab chests in wave (or 3-man it for speed?)
So far 4 splits, best is 787 kills per minute...not bad for Tier 2.