I had My PC as a Barbarian, Eder, Aloth, Durance, Kana, and another custom character which was a rogue.
All were level 6, minus my rogue, who was only 5.
I set an ambush in the room before the blood well that you can fall into on a floor a couple levels up. What I did was clear out the immediate area so that my people would not be interrupted by even more baddies. Then set my 3 front line guys (Barbarian, Eder and Durnace) Near the door, but with some stand off. Kana and Aloth were placed further back in the room as both of them are ranged. I had my rogue set a trap towards the right corner of the door (I used a poison gas trap for AOE and decent damage) then moved the rogue to attack the Xipauslaksdk Champion. Once combat was initiated I moved my rogue over to Aloth and Kana. Aloth prepared a fireball just as the Drake was entering the room. Once it hit, I swarmed my front line to the door to create a funnel and stop enemies from entering the room. Everyone but Aloth focused solely on the Drake. Aloth lobbed another Fireball past the dragon into the huge crowd of Xipsaoskdoksldk guys. I made sure to use every single special skill I had at my disposal to cause damage to the Drake. He puked fire once and only hit Durance and Barbarian. Once the Drake had died only 2 Xipaosidokslr remained. One was in the room with me and the other was a High Priest who had not been aggro'd probably because he was standing near the stairs down.
I've since switch Durance to ranged weapons because he kept getting killed. So I have 2 Melee to tie up anyone that comes near and 4 support with a mixture of bows, guns and wand to deliver some serious point damage.
Most things I encounter don't survive the first volley. Its been very effective so far.
I hope this helps you. I just cleared the 7th floor and will probably get back up to the story. I think I have done most everything I can prior to getting to Defiance Bay.