Mordane76 said:
The Jovacs my group faced were summoned into a gladiatorial arena, so the party quickly learned to stand clear of the retribution area. Unfortunately for them, that meant only the ranger could do any real damage (we use an archer-variant ranger instead of the PHB ranger).
Jovacs are CR3... 8 of them is CR 11...
The Spellweavers are CR14 together...
The Demon Lord is CR 18...
The Death Knight is at least CR 13... but it has to be around CR 18-20...
And I can't even find the Kythons...
So... that was like a CR what... 27? 
All in all though, that's a nice collection of oddities -- all those creatures, while not necessarily Outsiders, they would make excellent choices in a campaign that features the weird and the wild.
The Death Knight was CR 16 (13th level character). The Spellweavers were advanced, and thus totalled CR 16. CR 16 + CR 16 = EL 18. EL 18 + CR 18 = EL 20. The Jovocs are actually CR 5 (unless I've misssed an erratta). 8 of them is still EL 11 though, which technically doesn't add to the encounter. However, when combined with the Kythons (around EL 11 themselves) they could reasonably bring the encounter up to EL 21. The results (1 dead PC, 2 dead animal companions, many dead enemies, and a fleeing party) are about what you'd expect from that EL.
The Jovocs and Kythons were added on because the party decided to sleep the night in the demon citadel and got found. The Quasit that noticed them was not killed before it could tell others, and the monk on gaurd decided to just go back to gaurding rather than tell anyone what had happened.
Kythons are from the Book of Vile Darkness. They are the results of demons infusing their life force into reptiles and insects a few hundred years back. These are kept around to use as a small strike force / food supply.
The Jovocs are the primary strike force of the citadel. There are more inside, but many of them were busy re-killing some Bariur on Elysium.
The Spell Weavers are there because each wears a Slave Ring, to which Maphistal holds the Master Ring. A wearer of a Master Ring can deal 3d6 damage to a Slave Ring wearer as a free action every round, and thus they are on his side. They aren't exactly loyal, but they don't have a lot of choice.
There was also a Palreshee (sp?) there, but all it did was fail a couple of summonings and then stand back. It is not a big fan of Maphistal either.
The close quarters definitely hampered the party by forcing them to be near the Jovocs, but it also slowed the Spellweavers and Death Knight a bit, as they couldn't fireball, lightning Bolt, or Abyssal Blast.
The encounter took almost the entire afternoon, but it was enjoyed I think. The monk has learned to wake people (and two other party members now have rings of sustenance to allow them to stay on watch). The monk also learned not to try to trip big burly warriors in Full Plate.
