To answer some of your questions, the Albedo map is an image that has been somewhat desaturated to eliminate harsh contrast between shadows and bright areas. It allows other maps (bump, displacement, normal, specular, etc.) to bring out the detail in the model under PBR conditions. It is a desaturated Diffuse map. I created a compound node that somewhat does that in Poser.

A Roughness map is relatively the same as a displacement. A Normal map can be used for bump details although it is better to use an actual Bump map if you have it available. You will find Normal maps regularly used in gaming render engines, in my opinion, I would reserve those maps for background objects/figures if you want to show a little more relief detail.