Well, I was running 650 for A5S and never missed. For A6S, I was at around 669 and 0 misses.
I can comfortably say, A5S will require the same accuracy caps as A4S, maybe less as you're RARELY attacking from the front except for when he turns around for a tank buster or if you get Prey and you decide to land a GCD as he runs into you.
For A6S... You'll be attacking from the front slightly bit more but I've never missed either. So maybe:
A5S: 630 -> 647
A6S: 640 -> 665?
A7S and A8S should have a much higher accuracy requirement Jump simply due to mechanics and If we looked at the A1S -> A4S, it was approximately a 55 Accuracy Jump... which is why I foresaw a +700 accuracy requirement.
I guess I could play around with my gear tomorrow and see what it is for A6S.
