Oh sorry I mis read it you were sb and he was btn. 

I Jam pre here and take down the pot. A T is ahead of his btn opening range. I Jam hands like this <25 and may 3b/f if I have more but dependant on the opponent of course.

I dont like flatting pre here with the effective stack sizes.

As played tho I check raise all in on the turn  so that part of my post doesnt change, just pre flop.

given you have history it would be good to have reads and dynamics posted, as whether you have been 3betting pre, raising flops, floating etc changes your percieved range for different actions.

i prob 3bet/fold pre, bet flop, bet/call turn, shove river.

folding ATo 5 handed v button is absurdly nitty, even nits steal.

even tight players open A2+ K4+ 22+ 67s+ 89o+ from the button 5 handed.

as played if he nevers gives up on river i like to c/shove river, as his 2 barrelling range should want to continue on that river. unless he is passive enough to check behind hands he should be value betting