[Sc000t]

I'd start checking behind some weaker hands on the flop. And probably wouldn't cbet air too often unless the board dictates it (22Kr or ccc or AQKr...flops where he is unlikely to call you lighter).

How much are you cbetting? Try lowering to 4bb. If he isn't altering his ranges much then try risking less in those spots where he's calling a lot. And maybe back off on barreling the blank turn cards with air or light. Just try and focus on getting value from good hands and getting to the the river with any sort of weak made hands.

I could be wrong about this but I'd play a tighter game from the BB. I'm not sure if you are already but if you're using his passive posftflop play as a reason to loosen up in the BB, maybe think about tightening up. Reason being that he plays loose passive in his BB so just create a situation where the ratio of pots being played is mostly with you in position in raised pots.

The times you do play hands in the BB...try mixing in leading a strongish range. I wouldn't lead much air or weak hands but if he isn't going to be cbetting much then don't let him check behind with hands you're happy to check/call with. Not sure how this will effect the game but it could help manage the hand when your OOP.

In 3bet pots, I'd be tempted to bet at damn near all flops he checks to us. When he leads I think you should tighten up on and play semi straight forward with the understanding that he is probably leading a stronger range than a normal player in the same 3bet situaiton. This is all dependant on stack sizes obv. How does he play when stacks get deeper?...go over your hands and see if he seems to change as stacks get 200bb +. You could see him tighten up which will help give you a better read on his hand range/strength. When you flop decent hands in 3bet pots and get lead into, think about just calling rather than raising and pushing...reason being that his leading range is probably skewed to stronger hands that he isn't going to be bet/folding much...thus reducing the percieved equity you might have in semi bluff situations. Instead try using his passiveness by calling...I could be wrong but I doubt he will double barrel in 3bet pots when stacks are 150BB or higher unless he has a strong hand and you might see him freezing up a lot on turns and give you free cheap rivers if you want them or allow you to valuebet hands you hit.

For river play in 3bet pots I think you can still be bluffing a healthly "normal" frequency if the board changes. I'd still be a little gunshy about bluffing boards where the turn and river are semi blankish and it goes bet/call on the flop and check/check on the turn and he checks to you on the river...in that case I think he might be a little more skeptical and hero cally. But in spots where the board has a reasonable draw on it that hits on the turn/river....then I think you can find value in putting out bluffs on those rivers. I also think bluff sizing won't need to be high. Take a look at how you're structuring your valuebetting and bluffing sizes. If they are larger in these spots try lowering them a tad. Try 1/2 - 3/4 pot size bets for both...this should allow you to keep a bluffing frequency higher because I doubt he'll change much with his calling frequencies despite getting slightly better odds. This should help keep your bluffing range higher as you'll lose less when called.