This quest is a welcome increase in challenge compared to the other quest in the same ring.
The rewards are/seem to be much lower than that same, much easier quest though. There's a lot more spawns that can crank some some pretty heavy damage when multiple of them roll 20's or crit.
The end of quest XP is also fairly light (I think less than the other quest in the same ring too?) for a fairly challenging quest as a 7 max.
I'd suggest either buffing up one (or both?) of the gold piles from medium to large, or spacing out the spawns a little more so there isn't such huge damage clusters for lowbie pcs?