my point is that if his range is TT+, AQs, AK, then he has an identical amount of value hands that are behind us as behind us and a lot of combos of drawing hands (let's just call AQs, AK draws). from a theoretical standpoint, this gives us two sensible options based on reads:

1) raise/get it in (we assume that a fish is never folding an overpair so we are at worst 50/50 against his felting range, and are sometimes ahead of a stubborn AK, and price out 3/6/12 out draws)

2) call with the benefit of letting him bluff into us on blank turns and/or getting away from the hand on bad turns. this is a good line to take against aggros

using this logic, the three ingredients of giving him a range of a) TT+, AQs, AK, b) flatting the flop and c) folding to a bet on a turn blank isn't optimal from a theoretical standpoint.

i tend to give him more of a range of JJ+, AJs, AQ+ (this is probably something like his 3rd 3b in 50 opportunities, so he's prolly not someone who never 3b's unless they have QQ+, AK), which makes postflop a little less of a straightforward logic puzzle