The orc waves leading up to the second boss on heroic seem OP.  I'm a Kara'ed out holy pally (at the time I buffed out to about 1700 +heals) and was running with a prot warrior, a hunter, a mage and an elemental shaman, all of whom were SSC / Hyjal geared.  We cc'ed 2 orcs from each pull, but still wiped 3 times before finally knocking them out and downing Braggok (he's a cinch).

I ran it again a week later with some guildies (some Kara gear and one T5-ish mage) - no dice.  We never made it past the 3rd set of orcs.  Ugh.  The tank would get stunned, ending our fun.