http://i115.photobucket.com/albums/n320/shinobiunown/spiral_2011-09-05_1...

If you look closely at this screenshot you'll notice there is a patch of shadow fire literally on top of the fountain. I think the fountain should at least have a 1 tile radius of shadow flame immunity. For instance, a teammate of mine was literally trapped while reviving within the patch next to one on top of the shadow fire on the fountain and died again because he couldn't move at all. We ended up going to another fountain to grab water to splash the one he was dead by in order to revive him.

Another small suggestion would be to make shadowfire not appear from 1 tile away from walls and corners but that might make the boss fight a little too easy on the players.