5 handed game.
Hero stack $15400$
Villain stack $26800$

Hero is in cutoff with TcKcJhQh
Action folded to Hero
Hero raises to $235$
Villain on Button 3 bets to $840$
Rest fold, Hero 4 bets to $2655$
Villain calls.
Pot is $5445. Flop is Ad10s4s
Hero ($12748) bets $2938, Villain calls
Pot is $11,322. Turn is 6h.
Hero ($9809) ??

This hand I played today on $25-$50 deep ante on stars. This is the first time I'm taking a shot at these stakes.
Villain is a regular who is very tough and aggressive. He was 3 betting a lot IP. I was playing pretty tight compared to the rest of the table, I felt i could 4 bet kq10jds vs him as it plays fine against aces, and if he flats, on a lot of boards that I connect, he would probably try to bluff. Also, on low paired boards, I can get him off his hand. Please let me know if this makes sense.
On the flop, decided to go for a half pot cbet on an A high board and expected to take it down a lot. Once he calls flop, on the 6h turn with SPR less than one, what would be the optimal play?