After taking into consideration what everyone else said I think you should do whatever you feel like would be the most fun for you. You're the one playing for yourself after all not us, if you want Tobi now then do so if you have the patience to wait then do that. I use Ninja's in my lineup that I like as opposed to who is the most powerful because that is more fun for me. I don't care if I am the weakest player and get beat by people 5 levels under me for using "weaker" Ninja's, I would rather lose with my favorite ninja's then win with my most hated.