I'm inclined to bet the flop in expectation maniac would raise. I'd want to cut the field quite a bit here by facing them hopefully with 2 in a small pot.

At first I thought a flop c/r would be best but I'm thinking now it's the worst line. Looks like it would bloat the pot for overcards. They'll surely call one more flop bet.

The turn: I probably raise here. Depends on a read of CO. Some passives don't raise their straight or trips here. Some are seeing the river with A2o.

If MP3 caps I'm hoping CO drops out.

In either case I'm not sure how the river should be played.