You can have the load order any way you like, I'm just keeping similar mods together as they affect, well, similar things.
To reduce overwrites you manipulate the order of the similar mods so the conflict winner goes to the bottom.
The best example of this is with weapons as they have a multitude of overwrites. The order there is so the relevant mods are grouped together for ease of making the overwrites as that is one of the more complicated sections.
Power armor with ZF4 is the most complicated section, as a strong understanding of ZF4 is needed.
Is there something specific you would like to know?