Do yoy know that 8/10 if you go for han yoy get utakata for free because is a common rare in jinchuriki 2treasure? That said is hard to say really. Han is a double edged sword. For him to work well you need self buffing ninjas like sailor sakura and you have to go water or earth main i would say.
Roshi is op if you are op by yourself. If you are one of the top people in your server is very annoying.