BTW, you can level alts on Squirt too...
I'm getting over 10k experience a battle on my lvl 50 mage right now. You need a warlock and a few buddies to summon you to the general area of someone's garrison. Join a Kura/Erris party. Make sure you've dropped combat/threat if you picked some up going in. I'm leveling my alt as fast as my pets.