Is this a 9-handed table? Assuming Villian knows what he's doing, that will factor into his OOP calling range a lot versus a competent UTG+1 open.
Never played 2/5 live before because they don't have that around, but I assume everyone's just as terrible? I'd open bigger UTG, expecting to get loose calls IP anyway. So unless it's him and only shortstackers who are shovehappy, just charge them to play in position.

''I'm pretty confident he would be the kind of guy to XR hands as weak as 8x, 45, 56, 67, and maybe some flush draws I'm not sure. His small sizing does incitate me to call, because I assume he'd have incentives to XR bigger with a set or a straight.''

Assuming Villian is a decent player, he should not have 69/64 in SB calling range, and he definitely should not c/r a hand the hands you mentioned, except for bluffs with outs that are too weak to c/c. He'd isolate himself against better hands, and hands with tons of equity. And if he's at least a little balanced, he'd c/r the same amount with both sets, (combo)draws and bluffs. This is sizing is too small, as he's giving you fantastic odds, and even his nutty hands need protection on this board. Easy call.

Turn call looks good. You should only be beat by 87s and sets.

It's very unlikely he'd check-shove a straight here, thinking you have missed clubs. He's often given up, or wants to get to showdown with a pair.
You lose to JT (which is a perfectly reasonable hand to c/r the flop with btw), sets that want to get to showdown, and 87s. You beat all his pair + draw hands. The board is very connected, so almost always has at least a pair

Given that he's unlikely to call with worse, which would be AJcc which you block, and you have showdown value, you should check the river and probably be good >50% of the time.

And of course he could still call with better hands. If he's never checking a straight here, he'd never call if he folded a set. I assume you'd have to bet very big to get him to fold 2 pair+ here, and he likely knows you only have T9s, 89s, 99, A9s in your range to begin with.

Vilain can have 96s and 64s in his range, I know it for a fact. I play in France, games are way way crazier than in other parts of the world (wouldn't necessarily say they're easier ; they are soft, but can also be mentally exhausting). Anyway, vilain is a decent player for crazy live games. He has good live reads, but would be crushed online for sure. I still consider him decent ; at least he's agressive and smart, even though lacking technical fundamentals.

In theory it seems to be a good bluffing spot considering relative ranges right? Vilain is so unlikely to have better than 88. Bluffing this river with a psb left of 100bb+ is definitely a big bet for live games + I cannot get to this river with so many bluffs + I'm obviously able to value bet JT and better on this runout.

Still, in practice, not sure if ppl like to fold big hands :)

I think i'm taking the showdown here he can have too many hands that beat you and i think his calling range is only hands that beat you.

You hold Ac, correct?  If so, it might not be horrible to 3bet flop as semi bluff and to pot control turn- hopefully get to showdown or jam if the club comes on turn.  But with how the hand played, I just think we have to check behind this river as this run out is terrible.  Villain put in plenty of value for us when our hand is good.  You really can't be folding AA for less than 150bbs against decent villains

Intersting idea, I'll think that out.

check back river as you don't want to buff a guy who "He's doing martial art and can handle himself well" 

raise more preflop