I would just awaken spica and iris. They will help you 3 star base scramble 2. Your main commison map aha.. Leave what ever is left and work up to Saki .. The chances of a rotation is less then a black from free summon. Getting Saki right now won't help you with anything cause you gotta lvl her to decent before she is even useful where are spica and iris are good to go. And very good awakens