A Ninja without Throwing...

[Karbuncle]

Shurikens need to do just over 6 melee attacks worth of damage and tp gain to stay on par with just meleeing. (see earlier in the thread) More then this if they are to be better and useful and worth buying and losing inventory/gil for. Your idea would fix the TP gain, but not the damage, around 36 tp per shuriken only the TP is keeping up, and it's not increasing WS frequency. This plus like 700 base damage shurikens would be required with current game mechanics, maybe more, I'm not going to do the math to say exactly what it is, but rest assured 700 is low balling it.

Sometimes i forget how beast NIN is :|

Hmmm, Well there goes that idea too. I'm trying not to break the game when i do this, But lets see. Maybe starting at level 10, NIN could get a Shuriken Mastery type Job Trait. Each level would do something like this.

Lv.15 *Increases TP Gain, R.acc, Critical hit rate/damage, Reduces Delay, and Increases Damage of Shurikens
lv. 30
lv. 45
lv. 60
lv. 75
lv. 90

VI Tiers.
*Shuriken Damage: Increases Damage based on your level (your level x1.5) I.E if you're level 40, it adds 60DMG to your shuriken. level 90 adds 135.
*Delay Reduction. Starts at 10%, increases relative to Dual wield.
*Increases Critical hit rate by 5%, Damage by 5% per level. total 30% Each.
*Ranged accuracy: increases R.acc by 5 each tier (total 30)
*Increases TP Gained per shuriken by 7 Each level (Total 48TP Per Shuriken)

This is breaking the game in my eyes, and even i think it wouldn't be enough.