Known to spawn as a roamer on an upper level in the western part of the zone (one stop location is at location 405, 1025, 215 - southeast of the bar entrance).
Placeholder for A Raging Gygin is, or can be, an angry gygin.
I found him up as a roamer, near the central circular area of the city, wandering around mostly the west side. The max hit on me was almost 14k, although the vast majority were below that. He single target rampages, but I did not see any spells.