Liked of the concept. But I prefer the job being called as "Hunter", since it is more FF'ish.

For crossbow weaponskills, I would add:

Aim - Fires a shot aimed at vital organs to cause status ailments.

Sidewinder - Deals heavy damage with positionals.

Sonic Boom - Uses weapon to create area-damage shockwave.

Oust - Shot with reduced enmity

Boost - Greatly raises the next shot damage

Ultima Shot - The bow combo finisher