I just wanted to apologize for this quest... But it was intended as a grinding quest in the first place, so I will not change the droprates in the future.
As only one of the players in the game needs the hammer to summon the gargoyle, it's actually not that much of a big deal and provides something to do when there's nothing else to do.
The only design flaw of this quest is that the progress gets lost when you need to reload your character. There's no way around this, unfortunately, so pray to god for a stable connection...