To add to what Risvertasashi said, don't forget your DPS abilities! Holy is very powerful AoE DPS spell, and in addition to that it stuns all the enemies for a bit so your tank won't be taking any damage. Aero III is your AoE DoT, so use that with Holy and Assize for AoE damage. For single target, keep your Aero DoTs up and spam your strongest Stone spell.