Help! Night feeds

You should use all the breastmilk/direct latch and when it is not enough then top up with formula milk. For NB they dont drink much, 20-30 ml is enough but has to be demand. Example every 3 hrs, if you think breastmilk via bottle is wasteful, then try direct latch. I did this for both my kids, direct latch, with BM and last will be FM. Thank God they are on demand always for every milk consumption. But if you see only little consumption of BM via bottle then try other method, as mentioned direct latch. Slowly, it takes trial and error.