Aberration 22 - Always a fun addition to a campaign
Beast 20
Celestial 20
Construct 20
Dragon 20 - No no no no kill it fire (or ice, or lightning, or acid, or poison).
Elemental 20
Fey 20
Fiend 20
Giant 20
Humanoid 20
Monstrosity 21
Ooze 20
Plant 20
Swarm 18
Undead 14