well in general the events are really good,i got 5 seal scrolls with a 30% discount the other day so i used coupons,but it was not a smart move,so unless like me you're dream is to become the naruto version of ash katchum(gotta catch em all and all that)the fastest way is simply logging on every day and doing the events(especially matsuri,for whatever reason it's the most successful event for me)