you can't beat his stuff 100% of the time. if you guess that he is going to do 236d, you IB it and punish and get out. If you guess he's going to do something else, you might get hit by it. he doesn't actually have a ton of options here, you can play safely by trying to IB 236D if it comes out, and if it does, you get a punish. if he doesn't do 236d you can jump out and probably get in or punish most of the rest. the odds are not really in his favor if you block a 5d.