(((Hugs))) Kate
I could write pretty much the exact same post for H too. She sleeps about 3-4 (occasionally 5) hrs at the start of the night, then she's up pretty much every 90-120 mins after that. She comes into our bed too when she wakes so it's less disruptive but I know that's something else I need to stop.
As I say, we're in a v similar boat, so I can't really advise. But I had a few qns/thoughts:
Does C fall asleep independently at BT? If not then you could perhaps start by working on that until you're ready to also tackle NWs. It might make the NWs easier to tackle when you do.
Have you tried pantley's gentle removal plan? You could try that as well in the meantime until you're ready to attack the NFs more decisively. WDYT?
We used to have a bf prop at BT but I got rid of that several months ago using a combination of gentle removal and PUPD. After a couple of weeks of GR I switched to PUPD and I think it worked quicker because I'd spent some time doing GR first.
At the NWs does C feed until she's asleep or just for a bit and then when you put her down again she actually nods off?
Ita with PPs that just going for it is prob overall the quickest way. I just wondered as you're not quite ready yet, whether there might be a few gentle changes you could make that might make it easier to stop the NFs altogether when you are ready.
(H is teething quite badly here ATM so I'm not ready to work on dropping the NFs+co-sleeping just yet, but I'm trying to use GR to hopefully put us in a better position when we do).