Kind of reminds me of a worse archmage Benedictus strategy. I don't think teching against fatigue is ever going to pay off.
Fatigue didn't pay off as a Priest because Priest has worse control tools than Warlock (imho). We will have to try, but I'm pretty sure that a deck along these lines has a lot of potential:
Glinda Crowskin + Baleful Banker on it + echoed Baleful Banker on the 1st
Warlock can not be fatigued