(((Hugs))), I know how frustrating it can be. My DS was really hard work at night no matter what I tried until 9/10 months, he still doesn't sleep through reliably even now (but is far better) but the things that made the biggest difference for us were cutting the night feeds once he was ready (he didn't need a feed to settle, but definitely had some habit night feeds which I had to actively wean) and being totally consistent with how we dealt with NWs. It is so hard to tell whether routine or something else is up if LO frequently needs your help, particularly nursing to settle at NWs, at least that's what I found. My feeling was if I could eliminate hunger as a reason for waking, and I could be sure I wasn't APing in a different way (rocking, holding etc) then I could more confidently try to tweak the routine. Now you are at a tricky age in that respect as one or two night feeds would be totally normal for a 6 month old. But I do think at least one long stretch is reasonable to expect.
So with feeds, I can't remember if I said before but I would personally just try not to feed any earlier than you did the previous night. So if night one is 10pm, night two you settle all wakings before 10pm (including if it takes you past that time before she settles) and then feed at the next one. Doing that in literally a day or two we moved our feed from 10/11pm to 3.30/4 in the morning! In terms of settling, DS did not respond to me intervening much at all, it only served to wind him up even more. So I decided the best course for him was just to 'be' with him, rather than 'do' anything, because ultimately what I wanted was for him to settle himself, not for me to have to do anything. So I would sit/lie beside his cot, occasionally shhh, maybe put a hand on his hand or back to calm him or stroke his hair, but not pick him out of the cot. Once calm I tried to leave, but sometimes if but went on a while I stayed until he slept and then left. It did take over an hour of full-on screaming on a few occasions but subsequent times were much much quicker, and he was never left alone, I was with him any time he was doing an 'I need you' cry.
The other thing that helped here was to really listen to him, his mantra/cross cry was extremely loud too but didn't necessarily require me to be in there. I'd definitely made the mistake of rushing in a bit too quickly and giving him more space seemed to help if he didn't really need me.
Routine wise does she manage those high A times easily or does she show sleep cues beforehand?
