So EPIC level equipment are coming, here's a small list of materials you may want to start stockpiling.

With Feb 6's update around the corner, there should be an effort put into gathering materials to create Epic tier mats.

Aside from the obvious "Purple Tier" mats, there are some green tier materials that aren't used now that are likely to be used to craft Epic tier parts.

These materials include True Raingem, Green Yttria Ore, Gazer Cores, Crawler Ores, Incubator Ores, Custom Bushing, Prime Connectors, Core Power Cable, Cobalt Husks. (Cradle) Frames.

While not very likely, it might be a good idea to start stockpiling Debris you get from Bandits as they might start making it possible to craft specific materials from them.