You are far from it. Many harder bosses ahead, my friend. If you're frustrated now, God knows what will happen when you reach Simeon(Albedo's Mech) or the half dozen other kickass bosses.

Personaly, I remember using for that battle, Shion, chaos, and Ziggy. Of course, Jr., Shion and MOMO were my "final team." For now, concentrate on boosting your A.G.W.S.' power. They'll help you survive for a short while longer.

Oh, and don't forget. if you are really stuck, CodeBreaker is your friend....