Villain looks tighter/regish player like 19/16/11 over 150 samples.

flop : check/check. Check back from villain on AAJ is def suspicious in hindsight.
turn : 60ish prove from her with full house. Think this size is a mistake. I should target his random trips OTT.
river : 75 bet and faced 75% raise from villain. Hero's full house was already kinda bluff catcher at this point. But I no-brainer called just because its full-house lol. Sigh.

What is villain's raise range?
In theory, villain would have no choice but cbetting range OTF. But he did not cbet OTF.
Some random A3s,A8s, nut Flush? Slowplayed AJ? I don't think he would have 33 OTR.
He could have some random value combos such as better full houses than mine but don't think he could found some random bluff with this size.
Yeah feel like its enough to defend with just AJ/A8/A3.

My question is;
1. If prove ott, which sizing could be better?
2. After proving ott with your size, which size do you choose or not betting? And the reasoning?
3. Do you guys have any exploitative assumption about his check back range?

Think I choose 75size OTT > pot-120 overbet OTR line, then fold vs big raise.
After calling hero's 75 prove, his range is relatively strong. So targeting his random trips/flush.

Thanks :)