I decided to write to write this guide because some of you may be wondering how I cleared GR76 with only 800k sheet dmg. Well, I did it with this build.
I call this build "Prometheus" because the main attack is like the "spider aliens" you see in all Alien movies and the Prometheus movie. I can only say GR85+ right now because I cleared 76 with 800k sheet dmg which proves that this build can do well over 85+ with enough damage.
This build is very similar to a Blood Lance build except you use Corpse Explosion instead of Corpse Lance with some minor differences in gear and cube powers. The results are actually very impressive because the build will clear EVERYTHING in sight and even beyond what your screen sees which gives you more progression than your typical Corpse Lance builds.