Had this discussion some time back.
Carthage didn't use archers all that much (but they were used), but then again neither did Rome and they still get Roman Archers. Also given that archers are rather powerful in the game it is a serious weakness for Carthage not to have any archers, beyond those they hire.
It is also interesting that the Numidian Archers are in fact Cathagenian Archers.

So all in all go for it.