I could see them make SAM a self-healing tank if that were the case, in the same vein as WAR. Maybe since DRK is a MP management tank, SAM could be a TP management tank. Your self heals would cost you TP, but you'd be able to "regain" that through combos and cooldowns.

Now that you mention it, I recall far eastern swordsmen utilizing "war dances" in older forms of media. (okay mostly anime and parody movies) so this actually makes a lot of sense.