$8 1r1a: ATs, riverline?

[y_jason_y]

Poker Stars No Limit Hold'em Tournament - t300.00/t600.00 Blinds - 9 players - View hand 1816140
DeucesCracked Poker Videos Hand History Converter

UTG+2: t9418.00 15.70 BBs
MP1: t13029.00 21.71 BBs
Hero (MP2): t38653.00 64.42 BBs
CO: t15338.00 25.56 BBs
BTN: t11470.00 19.12 BBs
SB: t14950.00 24.92 BBs
BB: t6182.00 10.30 BBs
UTG: t15776.00 26.29 BBs
UTG+1: t1794.00 2.99 BBs

Pre Flop: (t900) Hero is MP2 with T A
4 folds, Hero raises to t1200, 1 fold, BTN calls t1200, 2 folds

Flop: (t3300) A 9 2 (2 players)
Hero checks, BTN checks

Turn: (t3300) 8 (2 players)
Hero bets t1800.00, BTN calls t1800

River: (t6900) 5 (2 players)
Hero ?????

villain über 80 hände: 21/10, 3b: 2%.

flopplan wäre c/c gewesen.
villains range wird am river irgend n pp, 9x, 8x, busted bd fd oder Ax sein. AT+ wird er am flop tendenziell betten. seh mich also hier vs seine range ahead.
bet/fold 3k > c/c (sofern um 1/2 potsize bet)?
alternative lines?