AK chip spewage against Maniac LAG?

Villan is 82.1/21.4/3.67 after about 30 hands. I've seen him get out of line almost every hand he's been involved in.

Party 10 handed 2-4

All folded to me where I open w/Ac Ks in MP. Villain makes it 3 bets on the button. I cap.

Flop: [ 6s, 7c, 3h ] I bet, villain raises, I 3 bet, Villain caps.

Turn: [ Kc ] I bet, villain raises, I 3bet, villain caps.

River: [ 3d ] I .......

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All comments much appreciated.