Agawulf,
Our LS has 4 members (including myself) that are looking at Thursday night to knock this demon out. Members and their possible jobs are:
Thunderstorm (SMN)
Zalacor (WHM, BLM, RDM, NIN)
Blackdeath (NIN, BLM)
Chaosys (RNG, NIN, but really wants to use DRK for stun)
You would be more than welcome to join us. We each have our chips and just need to go to Shrouded Maw to smack Diablos around. Give me a /tell sometime soon and we will see what we can come up with.