Thanks for this. A number of people have said the same thing so I will give the 2s a go :)
10.5 months and on teat 1
You want the teat to be the slowest/ most like your flow to ensure proper pace feeding. We’re 7 months in and still on 0.
I'd use either size 1 or even 0 as others have said you need it to be as slow as can be because otherwise you risk bottle preference
My almost 7 month old is combo fed as well and is still on the size 2 Mam nipples! Size 3 is way too fast.