Won't accept my own answer
Pro is deep enough you cannot just jam a big range pre flop for the math. With small blinds the pro can fold.
Pre and flop have standard bet sizes for you entire range. You cannot afford to give them any information.
If you are first to enter it would be for the standard raise every time. Like 3 bb pre and 2/3 the pot on the flop. On the button if they check the flop then bet 2/3 if you have any piece including draws.
Out of position I think you can check almost any hand as the pro on the button is going to raise pre and c bet like 90%. If you smashed the flop then check raise big. If the bet less than full pot you can call with any equity (even a draw).
If you play a big range the same pre flop and flop then you can hit the turn and they cannot easily put you on a hand.
HU you have to play a big range. You cannot tighten up to like 30% as pro can just fold when you bet. You will be blinded off faster than them. You need to be playing over half the hands even if you are not comfortable with it. You will need to play at least 70% (if not 80%) from the button and at least 60% out of position. Pro should raise every hand on the button. You cannot just forfeit the big 40% of the time.
Play a lot of draws if they are not charging you too much as you want to give yourself a chance at nuts or near nuts and not be out played.
Will need to call with some weaker hand if they are abusing it. But with a chip lead you can afford to forfeit some small pots.
If they even up the stacks then will have to play real poker.
If you get them down to 40 bb then jam top 30% pre.