I power lvled to 58 on sham so i don't know that much about easy lvling, but from 58-62 it was a pain. I was undergeard (had good stuff but not BC stuff), I could only kill 3 guys then i would have to drink water, think it took 4 waves of bolts to kill guys. When i got BC it was a little better 3 waves to kill mobs, but still had to rest after every 3 or 4 battles. At 62 it was like night and day. I had all BC gear and water shield. After that i was 2 hitting everything and not running out of mana. Now at 68 i am still 2 hitting stuff and like 1/10 times 1 hitting stuff and have no mana problems when PvE.