Did the whole thing solo as a 100 SK.
The CWG Gnomework Model XVII may hit for 18k, but don't let that intimidate you. He seems to swing slowly and his accuracy is terrible. I resisted every stun from the contraptions.
Pay close attention to Vergalid's banish. It wiped me the first time at about 50%. The second time, he didn't do it until about 30% but I knew what to expect. Set up an audio or text trigger for "being exiled." He spawned 3 adds the first time I engaged him but none the second. He does reset upon wipe, requiring 6 people to activate him again.
On the run back, I noted that the trash respawned. There are a lot of SI. All the trash summons, but none of the trash is flagged as raid mobs which is nice for OOC regen.
I would recommend that when you run your boxes down to Vergalid to activate him, you camp them out as soon as you get the "The ground begins to tremble beneath you." emote so you don't have to worry about them getting exiled. Vergalid's exile was the only challenging thing about this raid at level 100. The auras are a bit small to fit 6 people in, so you may want to shrink before this encounter. With sufficient DPS, you may be able to burn him down before he does it at all. I never got more than one exile per attempt.
I screwed up and didn't have Severing the Strings or The Pretender when I did this, so I guess I need to do it again.