Bitter Pickle looks pretty good to me, though I think I may have caught it while it was being updated or something. Halfdan's quests are indeed repeatable (or at least the Ribeth one is; I haven't found the cap for the others yet.)
I like the actual model for the water elementals, but I'm not too keen on them having a green particle effect or such an epic-looking death animation on a mundane mob. I wasn't able to catch the particle effect for Water Blast, so I'm not sure if it's not displaying or I'm just not seeing it.