Well really there are no classes that is true, so you if you have skills somewhat like a ninja would have you could call yourself a ninja if you wanted to.
Uh, since when can people jump 6 meters when they are only at most 2 m. Although a Kran might be taller I doubt he can hardly jump at all.
Of course you will be able to overcome a Klyros, just because they can fly doesn\'t mean they are almighty. As it says on the main page, they can fly for short times. And then I\'d assume they have to wait a while before they could fly again.
I must say I\'m against running on walls, just doesn\'t seem to fit in. And as for SD arrows... um, probably not.