How many bottles and nipples do you need?

Game plan is to have a BF baby using boob & bottle. If that doesn't happen FF will work just fine. The bottles I like received good reviews for mimicking the breast and reducing nipple confusion.

To start:

3 pack of Philips Avent Natural, 4 oz
2 pack of Comotomo, 5 oz

3 pack of Philips Avent Natural, 9 oz
2 pack of Comotomo, 8 oz

2 pack of slow flow nipples- each brand
2 pack medium flow nipples- each brand

Need more bottles? nipples? Stick with one bottle brand?