Anony Mous:
I am not sure where you live. I live in the U.S. and the state I live in treats teenage children of divorced parents a little different then when the child is younger. There comes a point in time where the court will let the child decide which parent he or she wants to live with.
Of course, this would mean filing to modify the orders previously handed down and that will require money. If your ex decides to contest the modification you will need an attorney. That will require a lot of money.
Here's a comprise - when your daughter is with you she is free to decide on her own to do as she pleases as long as it is legal, safe, and not against your house rules. In exchange your daughter is free to have your ex impose her religious practices on your daughter with one caveat - no baptism until your daughter is a legal adult and living outside your ex's home.
If your ex is not agreeable to the arrangement I would sue for primary custodial parent under the premise that your ex is damaging our child's growth by imposing the Jehovah's Witness religion on her. You are agreeable with your daughter attending meetings, assemblies, etc., but your daughter should be able to chose whether she is going to dedicate her life to a publishing company once she is an adult.
My wife got out before I did. I agreed that our children would choose their own path. In fact, I think the only thing I was opposed to was having a Christmas Tree in the house. There was no argument. A few months later I was out and that December I bought our first Christmas Tree.