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You don't want to be taking many free showdowns against a guy with this range. You must value bet him relentlessly.

To me his stats dont indicate that hes super lag or maniacal, just lagish. You said hes leading flops with any pair or any draw, a big chunk of his AF will come from that. Some players like this will not stop raising flush draws, but I'll assume if he does that youd have it flagged.

The pots approaching bet call but I don't think its quite there if you havent seen him make wild river plays given the way you played this. Im usually comfortable with bet fold unless you have less than 50 hands or so with him in which case I bet call.