I just soloed this thing as RDM62/WAR31, got 160 exp off it... it was pretty much an easy fight (it hit me 30-50 a hit when stoneskin was down), but then I ran out of MP without even noticing (I was looking at some spiders appearing and dissapearing in the ceiling, lol), so I slept and proceeded to rest when it was @5%, Soldier Crawlers started to pop, I dropped a Thunder II to end it.
It's not that hard, is was a T on me and I killed it without much problems, but I wouldn't recommend anyone soloing it at such a low level.