Help: sleep training with dummy?

[TedLife]

DD is 5.5 months old. She has been waking hourly for about 3 months now with the odd 2hr stint thrown in. Last night it was less than an hour between wakes. I'm so desperate, she's child #2 and her brother was also a poor sleeper at this age but I just feel like I can't cope.

We did everything "right" this time to try combat the bad sleep from her brother. She's napped in her cot from 9 weeks. Has a solid bedtime routine. She can fall asleep on her own although she's fighting this at the min but she can. Albeit with the dummy in.
She has a dummy because her brother did and it's kind of the only way we know how to parent. Plus she had lots of issues with wind when she was tiny and the dummy helped. But now we're wondering if it's stopping her staying asleep. She doesn't wake every time it falls out and has on occasion (rare) done 3-4hrs with it out so we don't think she notices all the time.

She ticks all the boxes for us doing the "right thing" but still, no sleep. She also only naps for 30mins at a time in the day. Nothing we do seems to change that.

All the advice on sleep training etc don't ever mention a dummy. Is it possible to sleep train with a dummy? If not, we have no clue how to take the dummy from her without screaming and waking her brother. Sleep training also mentions establishing a lot of the things that we've already done so I'm a bit sceptical that it will even work for her?

We don't even know if we want to sleep train as we don't agree with the crying methods but I don't know how much longer I can go on like this.

Please help.

We have a 5.5 month old who we are slowly helping to sleep better. We have gone cold turkey on the dummy because it can actually STOP them falling asleep quickly as the very act of sucking stops them falling into a deep sleep (because it's active).

So we follow this routine:

6/7 Wake and feed
9 -10 nap
11 feed
12-2.45 nap
2.45 feed
4.15-4.45 nap
7 feed and bed with a bottle as well
2.30am feed

This is something we've only achieved this week and it's been hard work. Previously he was sleeping max 30 mins in daytime and waking every 2 hours for a feed.

For the naps, we roll him onto his side and pat his bottom until he sleeps. Watch the monitor like a hawk and when he wakes, straight back in to soothe him back to sleep in the same way. We're slowly pulling back the help now. Third nap can be in pram.

In the night, we settle him the same way until he cries for 10mins+ when he's hungry and then I feed. On yhe first night of reducing milk intake, I used dummy and rocking and everything to keep him asleep but not eating milk but now it's minimal.

Does this make sense?

I know how hard it is, I was struggling so much too but just feeling back in control has helped a lot (still knackered obv).