Funnily enough, someone from Gaf said that the first run or two are the most difficult, and then it "becomes easier".
I guess that's entirely true: I had to use a 100 lapis to revive in my first try, but then something clicks and everything starts becoming easier and easier.
A tank, full breaker and a healer are a must and someone with Cheer helps a ton. After that, fill the team anyway you want with some high level units.
I could not auto the pro level, mas overall, it was just time consuming, but not that difficult.
