In a true Brayflox SR, you'll want war, blm, blm, sch. If the healer is good and blm know how to dps properly you should be able to pull all mobs from start to first boss in a single pull. The next pull will grab ALL the goblin guards ignoring the raptors (ie., all the mobs to the second boss). Third pull will be to the gated door. 4th pull will be to the last boss. If you take more than 4 pulls its not ideal.

P.S. A normal non-SR version of brayflox with randoms typically will take me 16-18 minutes.