Main problem is that a bot can't change fighting styles. A solid group would be along the lines of:
Oracle (x2)
StoneCrusher (x3)
3x powerhouses (ChronoDragonKnight, LDmK, etc.)
CardClasher is a good substitute too, I guess.
Edit: If you're using Carbon, use the left arrow and select Skill Range ++ to avoid the "out of range" messages.