Yes, this would actually be enough, I agree.
For my current playthrough I did exactly this with the Fort Joy mirror mod: get all companions I want for my custom character, spec them properly (not having 2 loremasters, 2 barterers and 2 pet pal dudes is MUCH better) and then unloaded the mod.
And yes, I also agree with the "conjurer-INT-problem". All I want in my conjurer is CON and MEM (the WIT I need for the quests, the traps and the treasures I get from "stinky" - yes, I specced her with "Stench", because this talent is actually REALLY good - Sebille).
