Speed is one key, I hope you have thief hats. Ninjas and thieves are fast classes to bring. To keep Rafa from being a suicidal pain in the neck, hit her with foxbird or frog. She'll run away from battle when she's a chicken or frog. Check Celia and Lede's individual equipment (Barette and Cachusa) to see which status effects will effect them. Try to steal the aforementioned equipment if you get the chance.