My friends and i decided to tackle the omnigul nightfall when arc damage was on (keep in mind, we aren't "MLG pro", so this was difficult for us) We got through most of it in 30 minutes, until we got to Omnigul. Took us like 20 minutes to kill the stupid witch (see what i did there?) the rewards menu pops up, and we all got shards or energy. That's not the end though. They both have two characters so i decided to help them run it again. Took us a little less time to get to omnigul, but omnigul took us a lot longer. It had to have taken us atleast 45 minutes to kill her. The relief when she died was like lifting a building off of my shoulders. When the rewards menu popped up.......shards and energy for all of us again. It was hilarious. None of us could breath we were laughing so hard.