I would get your partner to deal with the night wakings. The fact that he could get her to sleep without milk is a great first step actually, even though he had to hold her for two hours! It shows you that she doesn't need that milk, she isn't starving!
When she wakes I would go in, not pick her up, but rub her back/tummy, shush her, sing if that helps, offer her a comfort toy, dummy whatever she has. Comfort her, but she stays in her bed.
Then leave and stay away for 2 mins. Then go and comfort again. Then come out for 3 mins. Then 4 mins. Then 5 mins. Each time go in so she knows he's there, comfort, but don't lift her up.
If that seems too harsh (it's not for everyone), then do the same comfort without picking up, but stay with her until she's asleep. Just keep shushing and patting until she's asleep.
It won't work immediately. You will have a couple of nights of horror so do it when you know you can stick to it.
What it is essentially is just breaking the habit of needing milk/cuddle everytime she stirs.