If I had to start again with my stash, knowing what I know now having had my DS in a variety of MCN, I would buy exclusively AIO or AI2 type nappies with boosters. I would have a starter stash of easi-dry bambooty nappies (size mediums) to use from birth and then some bonnibuns and/or itti bittis for when they outgrown the mediums (around 9 months give or take).

Of course every baby is different etc which makes it harder.

The other lesson from my experience:never buy velcro, the kids learn to take it off and I find it never stays on the wash tabs in the wash and gets stuck to other nappies.