Want to know what materials are worth spending guild proofs on? I made a tier list for which ones make the most sense!
Note: We're not just talking about the cheapest, we're looking at what materials are the hardest to farm while still considering the material price. This is assuming a solo T11 player, who likely has access to a dungeon wayvessel. Materials that are easy to gain en masse as a T11 are tiered lower, and vice versa.