A friend of mine in Pittsburgh recently got his visitation increased after years of fighting. He did it by sending to his ex complete documentation of all the times she’s kept the father and children apart, all the stupid court orders she filed, all the abuse she’s heaped on him over the years.
With this collection he attached a simple note that said in effect “I’m saving everything and when our kids reach 18, I’m going to show all of this to them so that they finally know the truth.” He said in less than two weeks she gave him all the contact he wanted.
Stay on the high road at all costs. Keep detailed documentation. Use the truth to get what you want. Even the cruelest, most self centered parent can’t stand the thought of the kids learning the truth.
Might be worth a try.