Either the 3xFC opener or when the group doesn't want to wait for some reason):
SEcombo, BBcombo, HS, Berserk, FC, finish BBcombo, (pop your IR, Vengeance/RI, pot during this) SEcombo, FC, FC, Fracture.

If the SCH is using Selene, the skill speed necessary to get in that last GCD is pretty low. If no SCH, I've never gone out of my way to get SS, and as long as you are popping CDs such that it doesn't delay the usage of GCD, can probably get in that last GCD. I've also found that I don't pop Berserk right after HS. I wait until the GCD is about 50% through, then I hit it. So you don't lose time on the front end waiting on GCD to come around for that very first FC.