I had a short-stacker to my left all of today and when I was trying to steal the blinds, he would often come over top. I called him once with AJs and won but I am not sure of how to counter-play the moves he is making with his mechanical system.

If he is playing 9|9...do I open pokerstove and maybe choose something like 6% of hands and push them? I noticed that if I played AJs vs his 9% range in pokerstove...I was behind so I am wondering if my push was in error?

So...what hands can I push vs short-stacker in big blind when I am on button?

thanks