i have an mf blizz sorc that does about 5k dmg with over 500 mf
i have 1 point in warmth, 1 point in each armor which was a waste of 2 skills cause you only need the first one (good for def bonus and freezes when hit by melee)
i think its a better use to put points into blizz's synergies instead of using orb since it will never get near the power of blizz due to lack of synergies and damage to start with