Definitely scrap the Credit one, the vanilla BOA, and one of the lesser C1's.
Catch 22, IMO, as multiple cards show you're "handling a lot at once" to lenders, but "putting effort" into some cards that probably won't grow down the road.
Honestly? It depends on you. A heavy spender can benedit more from different cards with different rewards criteria while a light spender can be just fine with only a few cards.
