Decided to run them as 5 x bear today in a Maw + 4 (sanguine). Only managed to 1 chest it though. Their damage is too low at my ilvl (860-870) and I decided to pull the fear + heal packs back just to be safe.

If I'd had a different affix I think it would have gone way faster. With the bears I'm pulling multiple packs, stacking thrash, and moving on before they die, so I'll be kiting 1-2 packs when I pull the next. It's pretty different and fun. Really doesn't work well with Sanguine though because you end up dropping 20 mobs in the same place.