I've just boosted my shammies from 40 to 50 in a couple of hours played (i was getting between 190-220k per hour according to xp fu)

I used some cheap green plate and shields lvl 67 (85 Duration) with either +mp5 or +sprirt.
i got my mp5 regen up to 220+ and could just take the beating and heal when required, by the time the heal was needed again (consecration aura and spiritual focus), my mana was full (no figurine )

had to reset Zolo about every 30 minutes, by jumping off the ledge- had to repair my armour every 4 resets (had 8 shields used approx 2 per reset).

I've now decided at 50 to carry on leveling normally - the only thing that hit me was the cost of skill leveling 10 levels and the fact that my shammies are now level 50 wearing 38-40 gear 8|