It’s been done before by several people, but I thought I’d share my solo too and provide some tips to anyone who also wants to try it. He’s actually a very easy solo with slow and obvious tells.
The troll only has two moves that you need to dodge.
1) Lightning Ball Pitch – his arm will pull backwards like a baseball pitcher’s windup, and then he will do his throw. Dodge as soon as you see him extend his arm fully backwards.
2) Stomp – He leaps in the air, then stomps the ground. Dodge towards the troll when you see him at the peak of his leap.
Energy sigils and traits/utilities that give vigor or endurance regeneration is helpful for this fight. Hopefully less players will range this trivial boss with this info now :-)