ZF does take a bit longer to boost than SM/ulda. I would probably only do like 10 at a time. Just being a clothie you go down faster in ZF. I have boosted through ST and BRD. But either one of those got to be pretty slow, drinking and eating after every pull. I did complete all the quests for ST and BRD, so it was worth my 1 run. As far as grinding non rested exp stop after 45 and switch to quests.