To be perfectly honest, quest after 50, if not after 40.

I have no definitive information supporting the fact that this is quicker, but:

1) You'll need to get to know your group instancing properly (even if boosted by a 70)

2) The efficency of a 70 boosting your guys in 55+ instances isn't anything compared to their efficiency boosting to 40.


Just my 2c

PS: What they said RE accounts, be careful, or be very pissed