What is the best WOTLK instance to grind for XP?

[Boylston]

I can say from experience for XP/hr and ease of run, UK is way better than Nexus. After those two instances I'm not sure what comes next, but start at UK and run it a bunch for good XP.

Depends on your team configuration, I suppose.

Here's some nice things about the Nexus:

It can be run in a "loop" without actually needing to kill any bosses. (If you're just trying to maximize XP/hour, this is nice) I killed all the bosses except for the last boss in most of my XP maximizing runs.

I found the bosses to be a bit easier than the UK ones, at least for my 4xHunter+Healer setup.

It's a very convenient dungeon to get to, and has vendors nearby. I had a (Horde) hearthstone at Warsong Hold and could easily scoot over there.



I didn't particularly find the Azjol-Nerub dungeons to be good XP/hour farming, other than the first run or two to get the juicy Dungeon Quests knocked out.

Drak'tharon is good XP as well. I am grinding it a lot now that my team is 75ish.

Can't speak more about the other ones. I find that Nexus == BC Blood Furnace in terms of XP/hour, though.