Why do none of these builds use Insulate? At least for someone at lower level where we're not using Discharge all the time? Seems like a good low cost boost to survivability with little downside (Lightening Charge (sp?) doesn't seem that useful to my level 12).
Nevermind that part about not using Discharge, I thought using would use up the Lightening Charge (and thus the Insulate benefit). Playing just now I see that Lightening Charge always stays up.