Yea. All we did was power level in 5 mans. I'd be on the two RAF characters and my friend would be on his 80 mage. We did level 10-30 in one night, and then did 30-35, 35-45, and 45-60 all in single nights. All we ran was dead mines, stockades, rotated through all of the SMs, ZF and then Strath. ZF gave the quickest and best XP of them all. We could have probably done ZF much longer than we did. We moved to Strath at around 50 and got 2 levels a run... but a run took us like an hour and a half. Those 2 levels every hour and a half in Strath were nothing compared to the 2 levels we were getting per run in ZF taking only like 15 minutes per run. We did that until 55 and got bored, so we started questing until 58... after that it's all the typical Outland/Northrend stuff.
I forget how much I actually like Outland. In my opinion Outland is way more fun than Northrend - zone related, anyways. The quests in Northrend are probably more fun but I've never been a big fan of questing. lol