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Here I will use Negreanu's take on how to play Ace-King using his book Power Hold'em Strategy page 299.
Negreanu on A-K
In deep stack events, this hand is not good at all.
You don't want to get all your money in pre-flop with A-K. The reason is that you will be on the wrong side of a coin flip; that is, if your opponent doesn't have A-A or K-K.
You want to raise pre-flop with A-K, but it doesn't play well after the flop. If the flop comes A-9-6, and you bet and get called, this can be trouble. Your opponent could have A-9, A-6, 9-9 or 6-6.
A-K is a hand you will win small pots, but it is generally a dog if there is any significant action.
(Note: I could not find an example in his book using A-K.)