i am feeling the same way. Considering they spread the repair for most classes into 4-6 crafts, I have to switch class that many times (maybe more), then hunt through my armory for that piece of gear that needs repair. The mender is much faster and only cost a few hundred gils more. Not to mention carrying around 5 different types of dark matter means I lost 5 slots of valuable inventory space.

I think they should just make 1 type of dark matter. Have a repair all button that consumes 1 unit of dark matter to repair all your equipped items that you can repair.