I like to use Crono, Marle and Ayla. Its a great team for any battle. Marle and Ayla can use double charm to get items from enemies almost all the time. Crono can use luminare or use an awesome dual tech with Ayla. At level 99 Ayla can deal insane amounts of damage if she gets a critial hit. Crono and Marle can dual tech to heal everyone. The both have a life spell to use on people. Finally their triple tech is pretty good.