well not deviating much from the normal rules, just about how many elements you can use and HP stats. that's all, also like the no going a lil back in time to cover a jutsu or determine if a jutsu has hit you.
example:
me: i go around and trow a rock at you from behind your back
you: but before you trow the rock i grab ur arm (see the time difference)
or
me: I run and stab you in the back 20 times
you: wtf!? (i can't decide if i indeed hit you or not)
I'm a fair fighter if i can't come up with something to defend myself or minimize damage w/o going back in time i will say that i sustain damage, alsoo do u have a bio?