Went after the King for cleric epic. Group was 65 sk cle enc dru mag and a 65 rogue just for lockpicking doors.
The trip to the King is fairly standard dungeon crawl. There is a mix of normal and undead mobs and swapping between invis and IVU for a group is rather impractical so we used invis as much as possible but had to fight a lot of mobs anyway. They are all green and LB and have typical Kunark low HPs so this is just an annoyance rather than a danger. Watch out for traps which drop invis, there are a few on the way, notably on the final bridge into the King's building and another one right after the door which you open after this bridge. In other words, two traps back to back and they always aggro some trash.
You need a rogue to open two doors. There might be "tricks" that can get you past the doors without the contribution of a high-skill rogue but I used the rogue. There is an excellent YouTube video from an Agnarr necro who solo's the King and he shows a trick using his pet to get himself summoned beyond the door. Nice---and legit---trick, so let's call it a strategy.
Remember at the second rogue-needed door (in the Library) there is an invisible pit trap on the right tile which drops you right on top of the King. Clever! Any kind of lev will protect you as well as being invis'd since the King does not see thru. As bosses go, he's rather one of the weaker ones.
We arrived at the hallway outside the King's chambers and cleared the wanderers. SK went down to see if he could split some of the King's guards. The King has 2 guards right next to him and then 3 on both sides of the room, so a total of 8 potential adds. Our goal was to pull 3 from each side twice and then either split out the 2 near the King or just fight the King with those guards. We had the sk try to snare 2 or 3 guards but he aggro'd all 6 of the ones on the sides PLUS the King. So he FD'd and we used CoH to summon him away.
BIG mistake! Apparently not enough distance. So the King and 6 guards aggro'd up the corridor onto our group. Fortunately enchanter Fascination landed on the guards. So we burned down the King and then cleared the guards one by one. He blinded 3 of our group sequentially. Fortunately we remembered to load cure blindness which worked when cast. The King was a quick kill and the encounter was never in doubt.
Interestingly, the two guards closest to the King's spawn point never added. I think they need a harsh comment or two in their next workplace performance review.