Warning: You need to have a Guild with maybe 20 level 80+ members willing to take part.

Be Organized. Have Heart. Seek out his weak spots, Run when he uses Laser, and you can do it!
This is a TOUGH mob with so much HP, it will take a longgggggggg time to kill.
So be prepared with Assists to Res., and lots of HP Pots, and strategies.
It might be worth Praying to your favorite deity too. Cant hurt huh? :o)

Starting Npc: Ollien  (Public Officer Darkon)

Level Req: 70+, (80+ Recommended).
Part 2: Objective:

Get a Warmoniden from Haven.

Haven will take the three books.
In exchange, you get a Warmoniden. 
 

Part 3: Objective: Get your Guild into the Arena.

Take all the people in your guild who will be fighting the Clockworks into the Waiting Room.
this is the Cave just behind Haven in Darkon.
Talk to Eshylop in the Waiting Area:

She will take the Warmoniden, transport you and the members of your guild who are in the Waiting area, inside the Clockwork Arena.

GOOD LUCK ALL ! ^_^