Rating Difficulty: Hard

This challenge may take quite a while to complete, as there are a total of 63 points to be allocated into the Blood Crucible, with each level needing more corruption than the last. Apparently the Blood Crucible gains only 50 experience per nightmare stack regardless of Map tier, Pack size or Quantity. So to do this challenge, you can farm low tier maps to get the highest stack of nightmare faster, so that you can gain the highest crucible experience multiplier from the remaining monsters of the map, thus you gain even more crucible experience per map in the lower tier compared to the higher tier.

A page that tells you all about the Blood Crucible can be found here.