Thanks for the info! Do you own one and/or recommend it?
Surprisingly (based on the number of gaff decks I do own), I don't have one. At the price, I would only get it if I had a specific need for it.
I can easily force a card using a classic force or using a half deck of force cards (force cards at the top, indifferent cards at bottom) where I can show the cards as being different (fanning the bottom) and have them choose any card from the top. Alternatively, I could do a deck switch - hand a spectator a regular deck to shuffle and when they hand it back to me switch it out for a force deck. In one routine I do the reverse, have the selection done from the force deck (which is thoroughly shuffled by the spectator) and then switch to a regular deck for the reveal. You also could use a svengali deck for a force deck.
The prediction routine sounds OK, but it still looks like a card trick. The audience's focus would be on the selection of the card - not the accuracy of the prediction. There are a lot better prediction tricks out there that play stronger. I tend to like newspaper predicitons (predicting a headline) or the show in review predictions (saying what happened in the show).
The ACAAN routine is good (there is a good Magic Geek video on Vanishing's YouTube channel). However, there are two flaws. I don't like that the deck is spread face up and then the card is selected face down. Why couldn't the spectator just think of the card from the spread? Also, you can't hand the card to the spectator upon revelation. But then again, I've never liked the ACAAN plot.
What do you want to do with this deck? I can probably give you a good sense if it would work or if there is a better / less expensive way to do it.