Unless you have the new Enhancing Body (Which only adds 1 enspell dmg, no phalanx increase and I don't know the Temper formula on the check I did) how is it, you'd be casting Phalanx in Emp Body, Head, cape and Feet as there is no enhancing better for those slots. This should put it pretty close to the 5 minute timer if not at it unless my math is wrong.