So, an Assassin can stealth during a Warzone and become almost totally invisible? I know in a 1v1 duel, your stealth is essentially useless but like I've said, I'm not sure how it'd work in a Warzone. I think I'd be able to handle the Gaurd duty for a while, if it's only one player, I could dispatch them easy. I'm going with straight Deception, so I'm more fit for single target's and, like you suggested, stealth. I assume that Maul is gonna be one of my best skills to use in these settings as well.
One more question. ^^; My style usually involves me not moving and letting my PvE enemies come to me, which usually works in that setting, but fighting my enemy toe-to-toe in a Warzone and not doing much movement is going to get me killed, isn't it?