Yeah, I too wanted to use heroes that can benefit from other ninjas's skills, that's why I still use those 3 because I think they have the best synergy with each other, I checked other ninjas I have but yeah, most of them use completely different status effects...
As for auto attack, yeah, it was good for a while, but I started to see its flaws and just don't want to use it anymore.
As for this thread, I don't think my 3 previous question are answered...