Essences are still bugged in necro settlers-

Some mob types (I can 100% confirm mobs that are named syndicate - etc.) are bugged and don't drop any essences at all when killed.

This wouldn't be too frustrating if it were one 1 mob in a map but some maps its nearly every single essence mob and it just feels really shitty to spend time killing a mob to just see literally nothing drop when it should guaranteed drop specific things. Especially since T16 (or 17 if you're delusional) essence mobs are the true endgame bosses.