Villain is a REG NIT 17/13/6 in 2,4k hands with a 3% XR in Flop (1/32).

I think Flop is fine, our strategy here is cbet 1/3 with a wide range and vs this specific villain could be cbet range because overfold too much and xraise very little.
When XR, Solver estimate a range like this:
Value: {Set, T Dobles (A6)}
Bluff: {6x w/FD, 4x w/SD, FD + SD, 7x-5x-3x-2x w/FD, OESD, Gutshot}
But, I think this villain do not use this range and could be more tight with less bluff. But, anyway we can call vs any range with this combo.

OTT I think we still can call and his size make me think that maybe his range now not include a lot of 66-44 because i think he should bet higher to stack more easy OTR.

OTR again villain use a strange size because i still thinking that with 66-44-A4 he should bet higher if he still have someone of this. But I need he betting AJ or something or all FD's and SD, but this specific villain is too nit so i doubt he have enough bluffs.

On GTO or Balance point of view must be Call, but on Explotative view could be a Fold?

What do you think? call, fold? do you play any street different?

Thanks =)