Not sure really. I ran him at GR68, and it ran flawlessly.
No death's, 150bn xp/h, average GR 5 mins for 12 hours.
I put it to GR69/70, and it's insta 1 shot, 30+ death's per hour.
Didn't think there was that much in the difference between 68 and 69/70.
I'm tweaking my survivability and...