Pushing is silly. 100/200 blinds are not big.

Why push and take the chance he will call and double up, making it practically a dead-even chip count? The blinds are small enough that you can still chip away at him. Playing heads up is a matter of maintaining your domination and making a series of small victories. You want to get him to the point where you can lean on him and he will fall.

Min raise it or possibly 3x raise it. Don't push, that's ridiculous and will get you in trouble.