I think the next round of AP discounts will probably be released in Feb. based on past AP discounts. Although I believe one year recently, something was released in January. I would think the AP discount would include BC, but I suppose nothing is guaranteed. As I understand it has in the past. Also, I just booked with a GP discount. However availability is limited and doesn't always include rooms in all categories. I find it's best to go into the process being a little open. (Ie. We're booked at BC, but are willing to go somewhere else, if nothing is available. Or possibly switch room categories.)
I'm pretty sure the deluxe discount last year was 40%. So I'd guess value and mod would be around 30%?