If you're looking for decent combos, but mainly high damage, try Midnight Blade.

If you are looking for Extremely Specific combos, try Wind Main (although I wouldn't recommend in any case she's pretty bad)

If you're looking for pure power with a few combos, try Earth Main.

If you're looking for status combos which take control of your enemy with pure strategy try the water main (I would recommend water main for people experienced with the game and not new people)

If you're looking for some well-balanced combos try the Fire Main

Hope I helped! :D:D