*, dangerous is a bit wrong, if u want pure power spend always in events to get related stuff power, like refines, charms, myoboku gifts, for me ( i was always a f2p ) the best is to spend in lucky dice, mission mobilization, and even lucky star wheel, always exchanging the points for charms / refines. just save up all ur seal scrolls and dont spend in anything else than power items, at some point u can start thinking about to take a cloth (anbu one first). but i think is way better to reach a nice overall init and a decent lvl base of ur charms etc. hope it helpt :)