Hello fellow Rangers! I just completed this quest completely solo tonight with my 36 Ranger and wanted to share the latest info on the Inferno Goblin Wizzy in Sol A. Contrary to many of the posts I have read, he did not spawn at the bar after camping there for over an hour. After taking out about 2 dozen green and lt. blue goblins I decided to venture out and track him. He showed up blue on track and was not far from the bar. I found him alone in a room to the southwest of the bar at loc neg770, neg540. He cast 3-4 nasty DD spells (I resisted a few with only 40 MR but found my health bar at about 50%) and then he dropped fast. I got lucky. He had the heart of fire on him...hope the post helps...
P.S.-- Star Rubies can be bought cheap in FV, but if you want to do the quest fast buy them from the lass on the 2nd floor in the blue bldg adjacent to the Freeport Bank for 2-5pp more (depending on your CHA).
Peredur ap Gwynedd
Pathfinder of the 36th Wheel
Tunare's Forest Steward
Morell-Thule