Hello!
The Court Warlock fights are divided into 3 stages (Raubritter stage, falcon stage, boss stage).
1. Raubritter stage:
The first thing you should do starts before the boss fight. Make sure the blocker is the first one to enter on the lever room. My team is doing this boss every day and we noted that the creatures tend to pursuit, as soon as they spawn, the first player to get into the lever room.
When you pull the lever and enter the boss room, special kind of raubritter will spawn:
Frozen raulbritter: Melee, deals ice damage, immune to ice;
Raging raubritter: Melee, deals fire damage, immune to fire;
Poisoned raubritter: Melee, deals earth damage, immune to earth;
Energised raubritter: Ranged, deals energy damage, immune to energy.
You start with 1 of each raubritter on the room, and every some seconds (about 10) a new random one'll also spawn. You DO NOT WANT to have 4 of the same type on the room, because this'll trigger a special mechanic in which they'll get furious (red form), dealing much more damage, so your team must focus on whichever has the most numbers on it.
Every 30s part of the room'll get hazardous (the floor'll get a special colour and if you walk on it you'll lose lots of HP) and everyone (players and creatures)'ll be teleported to the center of the walkable room. Beware every time this happens so the shooters (mainly mages) won't get HSed. This mechanics'll repeat 6 times (every time a light on north wall of the room will switch off, showing your progress). When finally the last mechanics happen, you'll procceed to the next stage
2. Falcon Stage
The hazardous floor will now disappear and lots of falcons (about 20~25) will spawn together with the raubritters you haven't finished yet. On this phase all players should run through the room while AoE attacking 'till you finished the last falcon. This'll trigger the last mechanic.
3. Court Warlock Stage
Finally the Court Warlock himself'll spawn, on high red life or low yellow life (it seems that the faster you kill the falcons, the lesser will be his life, but not sure of that info). Just kill it, it's the easiest part of the boss fight.
Final advice: Don't try doing this on a x4 or lesser team, every damage is important to kill the raubritters fast enough. A level 600+ team should be fine to do it, as long as you all focus the right raubritters.
Bonus: I was part on a team that killed it on test server. The video was recorded by VDA Pedro and posted on youtube on the link below. Even though some adjustements were made on live server, you can get the essence of the fight. Follow the steps above and you should be fine.
https://www.youtube.com/watch?v=meFJJrbaqEs
