Personally I think you should go for gwn it have really good ninjas and in long run if you manage to get the super rare kurama or madara pays up big time. As far as the events ninjas goes its up to you rly. Depend what you want to play. Blitz, control, posion/ignite. Would recommend go for edo deidara since he is a standard and can be used everywhere. Sage, gnw matsuri etc.