If you're questing to level, I'd suggest Feral.

You basically have zero down time.
Between the damage of five melee characters.
And eventually healing yourself passively, every time a character gets a critical hit (which is very frequent).

My Ferals leveled a lot faster (via Questing) than any other composition (also via the same Questing route).

I used:
IWT + a Castsequence.

#show
/castsequence reset=5 Mangle(Cat Form), Rake(Cat Form), Mangle(Cat Form), Mangle(Cat Form), Rip(Cat Form)

You could stealth and pounce/ravage if you want.
Or use Faerie Fire in there somewhere.
I just ran at mobs and killed them.

That and flight form for any ground spawn collections (once you get flight form).