Lazarus is located in reekwater. Higher gearscore is recommended, and a good healer is a must.
You can get legendary drops as well as max GS items here (at least when watermarking isn't bugged).
Another thing to note - You can pick up a faction quest for this dungeon in reekwater that will give you some gold and rep. You can also pick up a side quest in shattered mountain that gives you the orb for this dungeon. The quest gives you a decent 580 gear score musket.
Chapters
First boss fight mechanics (Cilla) 0:00
Cilla damage multipliers 1:40
Cilla Bomb mechanic 3:05
Cilla Cone Aoe attack 3:20
Cilla Chest Loot 4:30
Final Boss (golem) mechanics 4:55
4-5x damage multiplier phase 8:50
Final Beam phase 11:25
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