[Karinya]

Full Salvage pieces take an extraordinary amount of time and work to get, as you not only need to be doing Salvage as often as possible, but also doing as much Assault as possible to get enough points to enter Salvage, then actually get the drops that you need, then make gil for the generally batshit expensive synth materials needed.

It's only body pieces that require the batshit expensive Imperial Wootz. (~8M per stack, and therefore, per completed body piece). Heads require the not quite so pricy Orichalcum Ingot (~2M/stack), and the other slots take much cheaper synth items.

Hands, in particular, take bloodwood lumber, which is ~50k each, so 600k for a stack. More expensive than crimson cursed items, but still not unreasonable. Of course you'd still need to do all the other stuff outlined above.