My thought process is

Week 1 - Sunday Monday Tuesday Wednesday have the children *

Week 2 - Wednesday Thursday Friday Saturday have the children *

On nights my X has the children but is working I gain custody for that day & night.

Or

Monday Tuesday Wednesday my days. X has Thursday and Friday. Rotate who has Saturday and Sunday.

Or

Have the children Sunday through Wednesday

I am considering nights again. If I do that I can't do 7 days on and off with the children.

My goal is by the time my youngest is in Pre-School (Fall 2028) have the children 70/30 and my Wife has the children every other weekend.