Do I cap this suited ace preflop?

[detruncate]

The pf raise/call is fine, but why are you betting the turn? You need all your pair outs to be live in addition to your flush outs if it's going to be +EV. Your hand has limited showdown strength UI so a free showdown is not worth the price. You will not take down this pot often enough for it to be a consideration.

Take your free card. It's tremendously valuable in this big pot. You do not want to spend a single penny more than you have to to see the river.

You have a talent for catching good river cards. I'd suggest keeping it up.