@Count.Rushmore created a list in the Featured Contracts thread with the breakdown of each contract. You can use this as a reference to determine which contracts have “Any Disguise” or “Suit Only” complications for the disguise in your goal of doing it all in the suit.
As for what is easier, I did a blitz over a seven week period and it all kind of blurs. But I have at least given you a start. Good luck in your play through.