Custom Format to achieve the same filter I do manually?

So I currently have a filter searches for Blueray, Web DL, Web Rip; 2160 and 1080. Then I sort by size and I manually download the lowest sized one, usually anywhere between 8GB and 12gb; never less than 8GB.

I also only use x265 when it’s 2160, otherwise only look for x264. just trying to automate cause radarr consistently tries to download 55GB files. Also using Usenet.

How can I automate this with custom format?

Multiple CF’s for different sizes and giving each a varying score, higher score for lower sized ones? Then another CF for quality/resolution?