Why the hell would you use Edward? He sucks, and the bastard hides every time he's low on HP.

Why the twins? You already have a better White Wizard (Rosa) and a better Black Wizard (Rydia) that can also call Summons, and the Twin attack won't be worth using both of them, especially when you have Holy and Flare/Meteo.

The first time through, I'll probably use the originals. After that, I probably won't change it much, unless I can get Golbez.