I've seen a million faces... AND I'VE ROCKED'M ALL!

Anyway, use whatever you want. I know just about every jutsu back and forth in English, Viz Media and Japanese. 

Yes, using those jutsu would be preferred. Granted that he is seventeen, you can squeeze by embellishing what he can do with them slightly. Even without jutsu, a seventeen year old can generally kick a twelve year old's ass.