It doesn't matter what he wants. He's not going to get it. Joint legal custody is always favored and the child support is a statuatory amount. Not up for haggling like a flea market.
The law is on your side. Go in front of the judge and let him make a fool of himself. The judge will see right through him that his motivation is money, and to deprive you of it. He's obviously a control freak, and a selfish one at that!