It sounds to me like there are two issues. Light sleeping and getting to sleep.
Firstly light sleeping (ie waking easily and often). That's likely to be caused by over tiredness which is in turn likely to be due to not enough daytime sleep.
she usually has 2 45 min naps. While shorter (30-45m naps) are not unusual at this she, they need to be frequent to avoid over tiredness. So I would probably aim for 60-90 minutes awake time between one nap and the next. That might mean only 30 minutes active "playtime" with 15 mins for a feed and 15+ minutes settling time.
I've just done a bit of maths and work out that would be around about 7 or 8 seperate 45 ish minute naps between 7am and 11pm.
The next issue is getting to sleep.
It is likely that a non- overtired baby is going to be easier to get to sleep than an exhausted one. So more daytime sleep may help with this.
Then the idea of Gradual Withdrawal is always giving enough comfort for baby alm the way until being asleep. But over time you withdraw very slowly the amount of reassurance baby needs.
So to start with, that might mean cuddling right into the cot, breast feeding to sleep and staying cuddling, patting and generally reassuring all the way until baby is asleep.
Then once baby is more settled with this, maybe it will just need feeding to sleep and then firm hand on chest for reassurance.
The problem you may face that needs realistic expectations is replacing bf to sleep with alternate soothing method. Realistically the baby won't have the manual dexterity to use alternate comforters (blankie, muslin, soft toy etc) until nearer 12 months old. So really work on another type of comforter of some kind, if not a dummy then a special toy or whatever. But be realistic that you are likely to need to carry on feeding to sleep for a long time yet.
Personally speaking, I'd be a lot more relentless with getting the dummy accepted. They are so worth it for ibdependant sleeping.