Finally got this Dragonslayer down legit.
Okay, I'll admit it, when we killed him the first time we had a bugged version. He never did Ground Slam. But, for the record, the 2 attempts before this were on an unbugged version and were 20% and 10% so I think we were going to slay this guy regardless. At least we'll admit that we got a bugged version, unlike the other guild that killed him and has yet to repeat it.
Anyway, the fight is pretty stupid and needs to be changed. Nobody minds a little bit of luck and randomness in raid encounters, but this fight relies far too heavily on the random number generator.
Here are the meters for the kill as well:
Loot and raid makeup can be viewed here: http://pacifistguild.org/points/40/raids.cgi?action=raid_view&raid_id=1162
See ya in SC!