One last update;

Have tried every which way to get them to ZF gy, nothing works. BRD is awful XP even at level 44. Questing takes forever because you are running from zone to zone or halfway across one... and half of them are collection quests. 60 jaw bones? no thanks. Seems to have completely stalled out using a 60 mage.

Probably just done multiboxing altogether or will switch to alliance and run with a paladin tank starting at level 1.

Boosting with a mage was a complete mistake thanks to Blizzard's grand idea to cut off certain parts of dungeons from XP gains.

Good luck to anyone else in my shoes.