· MIR4 Darksteel Mining Guide (Where to Farm, Tips Tricks) Level Dash MIR4 September 7, 2021 September 7, 2021 4 Minutes. Darksteel is the primary resource that players need to farm in MIR4 in order to earn a profit. This guide will teach you how to obtain Darksteel, the best loions to mine them, and some tips on how to farm them fast. Contents hide. How to Mine Darksteel in MIR4. .