Spoilers:
Ok I am stuck I have most Espers with the expetion of those aquired after chapter 8 and I am still stuck my Party Is Basch Balthier Vaan Penelo Llyud. I beat chaos then Mydia pops outta nowhere with her cool armour and i clear out the espers then go for her full out assault and do barely any damage. I hit her with pyroclam I forty my espers mind u balthier is starting to annoy me with his slow mist gathering capabilities but I need A good stratergy HELP.