I 've noticed a few unique and rare drops are yet missing on the server broadcast message, meanwhile useless items such as crystal key/seercull/mud bstaff do pop up.
The following rare unique item broadcasts are missing:
-Abyssal whip
-Zenyte Shard
-Heavy Balista
-Imbued Heart
-Eternal Gem
-Dust & Mist Battlestaves
Thats all I know off the top of my head.
I suppose bludgeon pieces are already broadcasted, havent seen any though so I am not quite sure of those.
