On easy mode it gets even easier (doh) no friendly fire) but I mean, select your tank on pause mode, make him use uhm that templar skill that knocks em all down, and he should have aggro on all the mobs, get one mage to cast blizzard and the other one tempest (lightning + Frost storm combo) and then one of your mages can heal the tank from incoming damage if any after making the storms, it really kills alot of packs very easy.
Mages do tend to get over powered, specially when you are a blood mage like me it gives you a neat powerfull AE attack and can pretty much solo any groups by my self already.
I usually use Earthquake(knocks down enemies in a huge range) and then setup the combo you mentioned.
