Ooh personal questions, 85kgs, long distance/smashfest. Needs to take some abuse. This is why I usually just do more spokes. Curious if rim depth means I should consider less.
Yes with deep rims you need less spokes. I’m bigger than you and run 18/24 spokes on 55mm Light Bicycle rims. Width as well as depth and rim profile is a factor; they are 25mm wide and a U profile.
How heavy are you? What's the intended purpose?
But deeper rims require fewer spokes, generally.