I'm a f2p. I've been collecting coupons in order to recruit Edo nagato but later I changed my mind and now I want edo deidara. What is the best event to recruit him? Many people recommend lucky board. I'm 100% FOCUSING ON NINJA NOT ON OTHER REWARDS. So I'm looking for the easiest way to get him (costing low coupons) . I've seen a guy getting him from gambling , spending 6.5 k coupons(oh st. Patrick!) I don't remember the event, lucky * or sakura's gift or something like that. Well I have collected 6.8 k so far. I don't want to waste them getting nothing. Moreover I have issues with my fortune, my luck *s. So what is the best way guys? LB? Mission general? Ninja recruitment? Shuriken thing? Pls tell me the easiest way to get EDO TENSEI DEIDARA :')

(My level's 79,BP is 60 k and I've collected 6.8k coupons so far)