CKPQ Bossing Strategy

I've haven't done the PQ so this is just speculation: but wouldn't heroes and drks be the most effective at the bottom bosses since they can rush all 3 to the side, and hit all 3 of them (effectively tripling their DPM)?

As Isaac said, this is incredibly dangerous for everyone but the warriors, as Nirg will power up the other 2 and they have very long distance attacks to kill the ranged people with.

Killing all 3 at once only works efficiently with a lot of warriors in the squad (6+ heros maybe). A speed run of cwkq bosses would consist of as many heros as you can get.