In my opinion I think 6 lightning is a must. It gives you the 3 sec cool down skill and gives debuffs in arm and hit and damage
This is what I use for my tank support
6 heal
5 bov
6 light
1 ice
1 fire

Works great in FFAs and 1v1
Like flitz said, you should get guru. For me guru arm isn't a must but guru helm is a must
Use enough for plat pack and rest on int (int so you can use the 3m/s and 1 h/s 2damage ring)