iv'e been there b4 killed all 3 got ceercul and such, but u need atleast 2+ people best way is 3 people (1 range, 1 mage, 1 melee)
well first 2 people open a door with 2 pannels beside it, the 2 people stand on it and the door will open, and then go down a little tunnel with giant rock crabs, u will see a little circle a ladder in the middle and 3 paths going to the circle , all 3 paths are blocked by barries and cannot be meleed from the front instead if u come from the left side, and shoot any blast (mage or range) from the left side barrier to the right and u can knock down that side and then the 3rd person comming from the right will haft to melee the back of your barrier that is blocking you from the left.
after that you will walk a few minutes down laders, tunnels, and meet some weired monsters,
once u get to the last ladder, go down it and youll see a big room (circle shape) the room is so big that u cannot see all 3 monsters on ur mini map, mabye 2 at the most unless u walk into the middle and feel like getting hit with range, mage and melee)
after i got to this part i was the meleer so i w8ed until my 2 buds ran (mage to meleer , rex i believe and the ranger to the mage) as i took on the supreme (range) supreme is the easyest iv'e seen so far took me about 14 sharks to kill useing torag and whip. and thats about all, i suggest u use sharks, super sets, and ecto telli or seers.