I would probably just jam turn in hand 2. You caught a great river but there are a lot where it will be unclear what to do. If he played straightforwardly calling would be better but vs a crazy guy I would rather just put it in. He's calling with lots of hands you have in bad shape. it's good for balance too although I dunno if that matters much vs 85/38 guy. but you'll have sets/two pair a lot here and would always jam those.

he's 85/38 so he can have many versions of 6xxx. say 6543 - you're ahead but it plays well against you because the outs look good to you plus he can bluff in some spots you can't call.

it's almost impossible for you to call the turn without two hearts in your hand so he should give up on river hearts although again he's goofy so maybe not.