[timoK]

I dont see how any (decent?) villain who 3-bets preflop with an ace cant c-bet that turn.
by checking he screams: "I dont have a spade and I dont have an ace"

if villain has a pair the river helps him. He should valuebet any set here if checked to -> gotcha!

if you donk the turn and villain has no Ace and no flushdraw you can get 2BB max out of him (if he calls down)

but if you donk and villain raises he has like Ax with flush draw, made flush, flushdraw+gutshot straight most of the time?