It's gotta come down to either an assassin or ranger. You need good defense, to protect yourself until you can run your ass away. Stealth, so no one can find you. And hopefully a combo that isn't a natural enemy of anyone else (neutral, non-mage, non-defiler).

So I'd probably go with an arial assassin. Assassin, cause they're so easy to just -survive- with, if that's your goal, they can level up pretty quick, and can see everyone coming naturally. And arial cause it'd be freakin awesome to be able to fly.