AP-S not playing because AP-A is doing all the job. You only need 1 AP in the field. You can switch AP-S to BBM/CM-S for potentially better result. If you're playing pressing game then BWM works, otherwise just use CM if BBM is too roamy for you
personally i don't like NCB, they can be too wasteful on possession at times. I prefer CB tbh. Same defensive performance but with ability to recycle possession much more efficient instead of clearing the ball to the orbit. You can use BPD if you're playing direct football