after 30 minutes of brainstorming, rego found our ultraxion

[Sanderz]

He's reforging to crit when he should be doing haste instead.

The following logs are from attempt 4. Take a look at the number of fireballs that hit and crit. It's fairly obvious it's a gear problem as well.
Zaith:


Mini:


Hyclox:


Myndor: