worst quest ever, i farmed like 4 first slate pieces and 10 third slate pieces... no second slate pieces yet, and it takes so Long to get 2 Fragments to make a key just to get a random Piece, it is so annoying.

Yes really annoying. I farmed about 8 hours -> only to get 5 first and 5 second slate pieces and I'm not finished yet. It takes too long to get 2 fragments, even if you have activated the node around the area (and I also had no luck with blackstones or something else). I'll breathe a sigh of relief, when it's all over.

Still better than me where i use the goddamn key and nothing spawns.

Worse, the Ancient Architecture Fragments seem to stop dropping for me after level 45. So cant even complete it...

[edit]
Ok, so they still drop after 45 but the drop rate seems to seriously nosedive. Takes several loops of Ruins Trees now, about a dozen just to get one Fragment to drop now.