Keep in mind willpower requires a lot of points in defence masteries, and as of today there are not many places to benefit from it. I actually have it unlocked, but prefer to run full offence without suicides masteries and full utility masteries with md 5/5. Also depends on your top champs. If you're going to do any hard content this weekend, don't have any saved revives and will spend units in revives, it may be an ok deal. Not sure if it's better then monthly eq completion offer though