|
Firstly, welcome to Dakka!
If you have both a Combined Arms (CAD) and a Formation, the two are separate entities and the models in the Formation do not take up any slots in the CAD. This means both that you still need a HQ choice for the CAD, and that you are not limited by the maximums (i.e. you could have 2 HQs in the CAD, and have more HQs in the Formation, without breaking any limit).
If you are using the "Decurion-style" Detachments, you are limited to taking from the Command, Core and Aux choices for that Detachment, but you can still have other Detachments (i.e. a CAD) in addition to the Incursion. If you just had the Incursion plus a Soulgrinder (I'm assuming that it's not just an Aux choice for that?) then the army becomes Unbound. If you put the Soulgrinder into a CAD (so you have the Incursion + CAD) then you are back being Battle-forged.
|