If you have meltdown, cast it on adel. also get zell in your party. Cast aura on him and use duel. just keep using punch rush and booya so you can make several hits in one second.
If you have levethian's recover ability, use it on rinoa every once in awhile. cast lots of supportive magic on her (don't bother with reflect).
Forget doomtrain, it'll just kill off rinoa before you can use a remedy on her.
Only use single target Limits.