Consult the necromancers of Painel (letter on table)
Kill the dragon construct on the top level of the rat cave of Sundered Frontier
Has tons of HP, it is recommended to bring at least some DPS with you to help burn it down
Go back to secret lab in Paineel, it's on fire and you will be attacked by a construct
Pick up the clicky book
This step requires having completed the Dark Mail Gauntlets heritage quest, and be wearing them in order to read the book
Defeat Ryizz in a special instance of Stratum
This is a solo instance with no mercenary allowed. Very difficult fight. You will need to adjust your AA spec and conduits for maximum individual survivability. Pull the named into the middle of the room, you do not need to dps it, but debuff it whenever you have a chance. An enslaved add will spawn every so often, ignore the name and DPS the add. When a sphere (there are different versions, arcane, elemental, noxious and dark) spawns, immediately change target and destroy the sphere. The key is to survive for roughly 6 minutes. After about the 6 minute mark the mob will have 15 "ticks" and die, and your quest will update. It should be noted that the name will do considerably more damage with each "tick", so do you best to save emergencies for use towards the end of the fight. My suggestion is that you make two macros, this will save you from lots of tabbing around and wasted time: