If you are going to go the route of adding fallen elves, you probably want more quantum pillars or some more reliable way to get
quanta or else they will spend most of their time just attacking. I have made a couple mutation decks, and while it can be fun and useful to parallel universe the mutants, I usually just go for an entropy/mutation based rainbow deck, as it is easier to use all the abilities of your mutants, and with enough quantum pillars you will (most probably) not run out of
quanta.