Problem with survival is,that,even if those ninjas are added,their drop rate is too low.Like DPB Hidan for example.By the time I get all 3 young sannins,suit Sai,Hebihime,Zaku,Udon,Moegi,Konohamaru at 3-4 stars,it drops only 10 frags of Hidan.His drop rate is lower than edo jinjurikis or 8 tail Bee.Only ninjas frags more rare there is Sasuke susanoo.