I think mediation is worth a try. When is was getting divorced, my ex's attorney made an offer in which I would received roughly 1% of the marital assets and would be allowed to see the kids once/month for a couple of hours with supervision. (Supervision for what? I don't drink/take drugs, I've never hit anyone... geez). Anyway, blah, blah, blah, we ended up in mediation. She tried to lie about her income, I had copies of her W2s, (thank you xerox), and in the end the mediator fought for me to have about 30% of the marital estate (ex was hiding her assets) and reasonable (unsupervised) visitation.
So--give it another try--it might work. Oh, and NO telelconferencing: tell him to grab some wood and sit on a chair in the room.