Minions to direct aggro if anything survives the flames
Party: 3 summoners with huntress/monk pets (1 at each hint 5), 1 summoner with DPS pets as a roamer/upper to grab chests and flash heal as needed.
Hint 4: This corner got all the attention from copter ogres, so had to place our roaming summoner here at the start of waves, until they stop spawning.