As far as using a prong rest with ACCs, you will be OK with straight offset, and a small amount of helical is OK too. Hard helical is going to be tough to get clearance. IMO, the problem is not all that different from the ICS type arrows, though. I experimented with the Whisker Biscuit to see what I could do with it. When properly set up, the accuracy is quite good. That will be my hunting setup until I see a reason to change.

I got 6 Blackhawk Vapor 4000 to try out due to all of the advertising about spine consistency. I was quite disappointed with them. From day 1 I had 2 arrows that would not shoot with the group @30 yds. even with field points. As Jeff B. mentioned, they also did not hold up well.