Most of the important units here are level 30, so to compensate I bring Strong up Combos and a health Combo. The basic idea is to keep stalling until you can spawn Bahamut. Catellite is the real important unit here since he can tank the Le'Solar, is Warp Immune, and is Slow Immune. Manic Mohawk and Zamboney are to help stall, while Fishman is for good chip damage. Breakerblast is very helpful in taking out the Barriers without needing really good timings.
Manic Mohawk 30
Catellite 30
Fishman 39+1
Zamboney 30
Bahamut 30
Breakerblast 1