2 & 3 Player Calendra is easy to setup!
For 3-Player: Remove 2 Ferric Changeling’s and all cards of one season (including rule card), then setup the game as usual.
For 2-Player: Remove 10 Ferric Cards and all cards of two seasons (including rule cards), then setup the game as usual.
Reccomended Ferric Cards to keep:
Count/Countess, and x2: Beasts, Changelings, Plagues, Mists