Probably something you can get in a 16 or 16L gauge, depending on how quickly you break strings. I would think 16 gauge gut of your choice (I like Pacific but others may prefer a Babolat or Wilson feel), and then if you want a primarily Comfy cross with good spin... CoFocus 16L is a good one. How many hours are you looking to get? How quickly do you go through a gut/poly setup? Do you want comfort as your main attribute, or control or just pure spin?
I have not used gut/poly in some time but I think I got like 4-5 hours before breaking. Im looking for comfort mostly as the APD is very stiff. But, my game revolves around topspin and a baseline game.