Light Tsukuyomi is pretty much fixed for the second Miracle Ticket. For the first one, you'll either want Amaterasu or one of the damage dealers. If Diana isn't in your team, you'll need to be running Ambush at all times, and Amaterasu frees up a slot to change Souls. You probably don't want to be stuck with Gawain or D'art all the time.
Amaterasu also allows you to switch elements later, if needed.