Have any of you higher level hunter teams tried mixed pets for PvE? I know a few of the pets have nice utility abilities like Screech, Furious Howl, Poison, etc.. What combinations have you tried or thought about?

I'd consider for my 4 hunter team PVE:
1 Wolf for Furious Howl (for pet dps), 2 Owls for DPS / AOE aggro, and 1 Boar for tank / charge

How about 4 Gorillas for AE? I know the Ravager, Raptor, and Cats are better dps, but is that dps really needed over potential utility / survivability of the others? I mean... with 4 hunters focus firing, stuff won't live long anyway.