How long would these balls of fire stay up in the air? and how heigh could they go? Most jutsu use the same amount of chakra, no matter how many of something is involved.
Like a fireball jutsu could have 5 fireballs, but it would all cost the same. \: So controlling the chakra usage could be a clan thing, or special ability?
Thats all ^ ^ Do a little here and there, and it'll be approved.