There's signs they can work together and I don't see anything wrong with going with it as long as they are scoring goals. Long term though Ben Arfa and Ba would be my choice as I think Ben Arfa will fill the gap between midfield and attack. Not to mention Ben Arfa is an international class star and whatever qualities the other two possess they are not on the same level.
Aye, for the time being, the Ba-Best partnership is doing alright and I say stick with it for now.