I was thinking of playing a ranged Magus whose primary attack is throwing darts or shuriken, via Quick Draw and possibly Rapid Shot. The magus can enchant a weapon with magical properties using the Arcana Pool feature - does this also work on 50 rounds of ammo, like most similar abilities do?
There's nothing in the rules to suggest that it does. However, I think it would be a wonderful addition to the magus's repertoire - I'd love to throw a flurry of firey shurikens at my foes and follow it up with a scorching ray or two!