If the dude fires a lot against missed cbets just exploit him by checking, otherwise just cbet like you would with everything else... And you if you decide to check to exploit him, you have to keep in mind that he will have a lot of air combos on the river even with the flush getting there which makes it more of a call. Obv how often does he shove river and how polarized he is when he does is way more important to determine if river is a call or not, but once you decide to not cbet flop to exploit villans tendency of firing dryish flops with air, you gotta make that river more of a call. IMO.
Is a 40/7 really running a 3-street bluff 200bb deep?
He has an agression factor of 3.5 with vpip of 40. He's spazzbluffing such a huge amount of his range i cant think he does anything other than bet or raise.