Artifex Deck
Buy this firstReddit r/boardgames posters say start with decks A and B; Artifex and Bubulcus are the second halves of the A and B decks that the base game only samples.
Needs: Just the base game
Adds: 120 cards (occupations + minor improvements).
Fixes: Adds variety; base game ships a curated subset of the A/B decks so repeat plays feel samey.