Crono, Marle, Frog

Crono's Luminaire is amazing and Marle/Frog's Double Cure heals full and all status ailments. When they don't need healing Marle and Frog can do glacier. Frog and Crono are also good on pure attack power. I usually have rainbow on Chrono and Hero Medal on Frog for criticals (I use a gold stud for Frog when I'm fighting a boss). Marle can sometimes get 'Stop' in there with the Siren. I also like throwing in Haste helms when I'm not fighting a boss. Chrono with max speed and on top of that a 1/2 wait time with 900+ criticals is all I really need in the end though.