The villain is a winning player. ave stake=25$ with 7% roi
this game is 14th match between us. Calls open=30%, 3bet=20% and the following is postflop read I have against him.

3x limp attack with JKss and check down 3cAc5cQd9h
c/r bluff on 5sThAh
no cbet, raise my turn lead with bluff on KhAd5d4c, no bluff on river.
3 barraling with T9 one club on QcJc6s4hJs(me Q9 no club)
c/r flop is around 30-35%

Here is the hand.

Merge No Limit Hold'em Tournament - t25.00/t50.00 Blinds - 2 players
DeucesCracked Poker Videos Hand History Converter

Hero (BTN/SB): t1400.00 28 BBs
BB: t1600.00 32 BBs

Pre Flop: (t75) Hero is BTN/SB with 5 A
Hero raises to t100, BB calls t50

Flop: (t200) 4 J A (2 players)
BB checks, Hero bets t100.00, BB raises to t300, Hero calls t200

Turn: (t800) 8 (2 players)
BB checks, Hero ?

His range is probably Ax, trapping with flush, or bluff. I am not sure how he play 2p at this turn.
my range is mostly Jx or Ax with/without diamond (or maybe slow-played set). I am not slowplaying 2p at A high board against this reg.
What should i do with my A5 no diamond? If I am checking back, I will probably call his river bet(unless he shove lol) given his c/r frequency. However, I am not sure checking is right.
What should I do if i have AK no diamond or Ax with high diamond. Are we still checking?
I like to hear opinions for 3 cases and reasoning behind.

I don't think he holds an A here. If he is decent he would b/f most of the time here. Imo there is much more bluffs in his range that Ax or flushes. Because you called his c/r, he is more likely to bet turn to get value from your TP or eventually from a big Jx (which I would fold to a turn bet I think) when he hits his flush.
Now you have two options. If you think he is capable of bluffing the river, then check is fine. It is even better if you have Ad because you don't fear anything.
Actually... check is always better than bet imo because we don't value anything. I would call a lead on most rivers because he wouldn't rep much. (and fold to a second c/r turn)

For all 3 cases btw

Flop seems fine, and I think betting turn against this guy is probably a mistake and he will put you in a lot of uncomfortable situations on this board. So lets try to take our hand to showdown and eval what happens on the river.

haru why didnt u shove flop

That is v good question. I am shoving with A5 against reg most of time but somehow I ends up calling here (for balancing? lol). well, sometimes you want him to keep bluffing after c/r. If his c/r range has less air, then I have to shove almost always but if c/r range contains tons of air, I think calling is right. he will lead most of turn with air.
Maybe from next time, I will shove Ax with non-diamond. this is an awkward spot.

I think vs a reg, calling will be better, because you let them bluff at turn, while vs a fish, shoving is better cause u get value from hands like diamond draws, strong Jx, maybe KT or something

calling/shoving against c/r has its pros and cons. we are basically getting it in against c/r 30%. we are ahead against fd, chopping with most Ax (because A9~AT+ is in his 3betting range), behind against 2p , crushing air.

1) shove is better if villain tends to stop bluffing after c/r on A high board, if we don't want to face this type of question, or if we want to make agg image. yes it is also true that villain might have KJ, QJ type hand.
2) flatting is better if villain will keep bluffing so we get more value from air. air has less than 5% equity against us, but 8d is pretty bad.

so I mix 1) or 2) with Ax with bad kicker against a reg. and I am interested in turn play now. I think this spot is kind of common in games between two regs, so I am expecting more thoughts

I'd check back, I don't see enough value to be had vs his range on this turn card. Also, not too many players c/r with Jx here.

clicking back the flop is an option

i check the turn not sure what to do on rivers tho

who is this against btw

On the AT5 c/r he folded to shove or?
Depends on his turn betting tendencies after c/r,i'd bet if he usually gives up on turn in this spot.