Live PLO $5/$5 $10 rock straddle full ring $1k cap buyin

There's a reg that constantly restraddles(Mississippi) the rock straddle with tendencies to repop it pre ~20% and seems to float and pound a lot post flop in position.

My question is where is the best seat to take vs this?

I don't want immediate left and be UTG every hand pre...or I think. And at the same time I want to have the most positional advantage vs him post flop.

So he's seat 1/9...where do we sit?