Like others said, go with #1. If you aren't getting that third night at MGM easily comped then it's not meant to be.

By the way, you get some nice CET offers from Vegas. I made Diamond Aspiration 1 last year, and while getting as many comped rooms is never a problem, my freeplay and food credit offers are like $40- for Vegas. I only get large freeplay offers from their non Vegas casinos, so they must really like you!