I got my Druid to Northrend. She was in the first and the only RAF team I got to 60. I leveled her to 65 for the alchemy spells and then to 68 for Xmute spec. So I figured, let me try out NR, a solo Boomkin, which had trouble soloing in Outland.
Something clicked and she ran through the start area (BT) and is at the airstrip now. Played maybe 4 hours and she is at 69 1/2 with 1k gold. Upgrades are falling with every quest it seems and she is almost in all iLvl 138 gear now.
I can also get her the Tome so she be able to fly through the zones. I will finish BT and go to HF next that should put me close to 71. GH, DB, and IC to 80 then 3 whole zones to cash in.