5/5/10 1300 deep. Loose and juicy game.

Hero in SB, dealt A6
BTN (Reg on tighter side) opens to 30. SB folds. BB calls (terrible player, donates stack every orbit), Hero in BB calls.

Flop 77T (75)
SB checks, Hero checks. Btn bets 40. SB folds, Hero calls
Turn 6 (165)
Hero checks. Btn bets 100. Hero raises 350. Btn calls.
River 5 (865)
Hero ? (800 behind)

I was fairly certain I turn x/r makes a decent profit by folding out a huge percentage of his range and when called I actually hit the A high flush.
Not sure what should I do here, bet small (250?)/big (AI or 500+) or should I check and try to induce (I don't think villain will stab here).

Fold pf. Turn CR is really bad vs a good opponent.

Can you be a bit more specific about SB than "terrible player, donates stack"? Is he terrible in a calling station or maniac type way? It matters for what I want to do preflop.

I don't like the x/r because villain's bet actually reps pretty strong. If he has air you don't need to raise, if he has something like a T he probably checks turn given how scary the turn card is.

I guess as played I bet small trying to rep a blocking bet and get some loose calls. Jamming seems like not much worse is going to call. Villain isn't going to stab if you check because he can't really have any bluffs after calling turn x/r.

Do you mean hero in straddle?

Pre's a pretty mandatory call with the whale in there, closing the action vs 3x open. Reg should be opening at least bare minimum 25-30% hands here, A6 is good enough to flat plus we have position on the whale. You cant ever be folding here is he seriously donates a stack every orbit. Ever.

OTF seems fine/std. The bet is very small, we should have the best hand sometimes, and he should slow down on heart turns. An Ace is almost always good, he shouldn't be betting too many A high hand here OTF.

OTT is kind of meh, his range here for betting is very strong. If I raise, I probably raise to $320, $350 is huge and his range for calling is pretty inelastic.

On a blank river you have to shove this combo here, blocking 66 and blocking nut flushes.

OTR is weird, I would consider checking but he is a tighter reg and he doesnt seem like the type to turn hands into bluffs. I would definitely be betting, probably on the smaller side $250-$350. If he jams, we are in a world of pain but most likely mucking. He'll have 98s and almost all combos of full houses, barring the offsuit combos such as 107o.

Hero is a terrible player that donates stack every orbit?

I'll assume typo and you're in straddle, or it's V SB, you BB and straddle mucks.

huge w/e, otth

folding pre, folding flop unless I'm running hot. A6o is perhaps the ultimate RIO hand.

turn is nice and perhaps justifies everything to this point if you're going to get funky with ++ turn cards. i like c/r line and sizing.

river you've hit your hand, are you asking whether to c/c trap, block or jam? i assume there's no fold button here. cc trap is fun at times, but V dependent and you say he's tight. i'd 275/c and look ever so slightly pained. 275/f is silly, we're trying to induce. if he has FH+ then fold pre.