For the record, I really LOVE the concept for this beer! Whether it ends up tasting awesome or not, it NEEDS to be brewed!! I want to do this now. I'm gonna brew an all oat beer this year!! Yeah!!
Personally I would skip a protein rest and probably just go with a single infusion at like 150 F for 75 minutes. Maybe throw in an acid rest if I think it needs it, or not. No need to go too hog wild with step mashing in my humble opinion, although I've never done this before so maybe it would actually be helpful? Not entirely sure.
Definitely keep us all posted!!!