If you after power you should buy 50x30 pots from mega carneval. Keep in mind that event is here for 2 weeks. you can wait for fuku but im done with that never a descent event to spend along with fuku. this shown in the last 2 weeks with a back to back fuku deal. if you after ninjas sure you wait for fuku but to gain power focus on pots until all your assist cards at lvl 8.