It took me forever to even get a mage head for my creature (which I actually got from the chest Lovis opens if you give him the soul stone), let alone a perfect one. Oh well, it was still very helpful just with the default parts.
I think with Lovis' soul stone, Larian wanted you to have to choose between helping less evil people and getting no reward, or helping the more evil person and getting something for yourself out of it. There are certainly quests or conversations in the game that could have been expanded on, though, given enough resources.
