Step 1: Nerf Demo by 30% because your internal tools are broken and in the process make it clear that not a single person on your team plays a Demonology Warlock. Demo is now performing below holy priests. Tell people they're wrong and tweet "I'm not seeing it" and "lol no" when they point it out. Act like a smug, glib, dismissive little dickhead any time somebody comes to you with any evidence of your screw-up.
Step 2: After a few thousand tweeter messages you realize your mistake and revert the 30% nerf. Demo is now in the upper-middle of the pack at 100. Unfortunately, Demo is performing too well at 90. Even though 90 is only for a couple more weeks, you decide something must be done!
Step 3: Even though level 90 damage is irrelevant and you've made the point that nothing is tuned for 90, you decide to return almost all of the 30% nerf that put us below holy priests. Demonology is now back in the toilet at 100.
Meanwhile Warriors are still running rip-shit over everything, outperforming us at 100 by over 50%. This guys really have no fucking idea what they're doing, do they?