My hunters hit outlands this week and I've been following Jame's leveling guide. Even though I'm skipping most of the collection quests, I'm easily able to keep up with the level.

There's always instances for a bit of a change. Ramparts and BF were good XP, but I found and Under Bog and SP to be naff for XP. Questing also helped get my gear up, as most of it was very low level greens.

They're 67 now, and I've only done 3 zones so skipping quests really isn't a problem, and the guide helps locate quests I may normally miss.

I know there's a ingame RAF multiboxing guide mentioned on these forums, which I'd guess is 1-60. If there's a post 60 guide for multiboxers then that would be nice as there are some collection quests that start larger quest chains and could be worth the effort. There are also some quests that look like collection hell, but actually drop for each party member like 20 Doom Skulls for Evil Draws Near.

I forgot about AV, may give it a go too