If you are going support, might I suggest a caster who has the quality Mentor Spirit: Dark Goddess? That one gives you +2 dice to both combat and healing spells, but it does require Willpower + Charisma (3) tests to keep from escalating confrontations. Combine that with your Shamanic Tradition, which uses Willpower + Charisma for drain tests; since your Will and Char should already have a good amount of points in them, you should be able to resist the urge to escalate things fairly well. Add in a rating 2 sustaining focus, restricted gear, power focus 4, and you should do very well. Get manabolt, manaball, heal, detox, and perhaps antidote, then mix in your favorite physical damage type spell fireball/lightning bolt/flamethrower/acid stream/etc.