even if u were to spend them on lucky board, cheapest ninja frag is Kurenai [summer] ( IF u're planning on going for her, that is) but even if u try, 6k is just not enough (each frag costs about 120 cps) while u need atleast 9k. I honestly think that it would be better if u get her full frags guaranteed instead few from here and few from there. so just like they said above, save :D there r better deals than this.