50NL AJs turn decision

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP ($143.10)
CO ($53.40)
Button ($56.70)
Hero ($78.50)
BB ($50)
UTG ($98.35)

Preflop: Hero is SB with A, J.
1 fold, MP calls $0.50, 2 folds, Hero raises to $2.5, 1 fold, MP calls $2.

Flop: ($5.50) K, 4, A (2 players)
Hero bets $4, MP raises to $8, Hero calls $4.

Turn: ($21.50) 7 (2 players)
Hero checks, MP bets $15, Hero ???

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I have only limited stats on Villian, he is about 80/25/14 over 13 hands so far. We've only tangled once so far, when I took down a moderate sized pot with my set of tens versus his two pair.

What's your move here?

I think 3 bet the flop and try to get all in. If he limped AK or has 44, nh and we still have outs. doesn't seem like an AK limper.

ap, idk. probably push. fe + mhig + outs = +ev ?