My idea would be to rehaul ninjutsu and throwing as a whole. SE has insist on keepign them but none of them alone are on par to any other jobs abilties / magic, the idea would be to "Combine both throwing and "Elemental ninjutsu" and maybe to the lesser extent debuffs as well in "Throws".
1.) Allowing a new ja "name up to people" where you choose an element from there a shuriken is consumed while doing Hybrid of physical and magic based dmg. They would still retain their elemental resistance down like the ichi.ni.san spells did.
2.) The damage it self would be based on throwing skill and the shuriken its self, magic accuracy would be based on ninjutsu. This would work for all spells that target mob, self buffs would still work like they do currently.
3.) This would over all increase ninja's "jack of all trades" allowing them to have other out put to dmg while reviving shurikens / nin nukes to a reasonable effectivness. It's like a ninja version of Quick draw but not taking its exlucsive ability to enchance debuffs.