I had some success in stopping the all night sucking using the Pantley-pull-Off method from the book No Cry Sleep Solution. You feed bub til they are settled and then take the nipple out. If bub wakes again, you let them attach again and re-settle. Then take bub off again. It's not an immediate solution, the first time it took many goes before she would settle. But over time, it took less goes and then she was happy to come off herself and go to sleep.

hope you find something that works for you

take care