Regardless of how you obtain it, ammo represents a significantly larger series of hoops that Rangers have to jump through just to play the job, relative to all other jobs except Corsair. Most other DD's you can just go out and start damaging things. Ranger you HAVE to have ammo to even be functional. If Ranger's damage was significantly better than other jobs to match the effort, or it could DD without having to worry about taking damage from the mob, the cost would be a little more justified. But why should Rangers currently need to put so much more effort into the job for the same results as other DD (sometimes even less)?