Is there a way to make ^it work? If yes, then what needs to be edited, because I don't see anything of interest in skills, abilities, or def_item_ingredients.xml entries. Yes, you can edit the values of non-synergy bonuses, but for some reasons, synergy doesn't work with monster\unique mutagens, only with vanilla ones (lesser, greater, etc.) I'm talking about the "color synergy" bonuses, when you put same color mutagens and skills "together".