Beginner's Guide to C'tis MA

[Calchet]

Unless I misremember seasonal heat variation, I do believe taking heat 3 rather than 2 is a worthwhile proposal:

While at heat 2, your provinces will vary between 1 and 3 depending on season, for an average of 2, a maxed-out heat will see it varying between 2 and 3, with an average somewhere around 2.66 - in essence, giving you the full point value for a lesser increase in heat. (It also leaves you more resistant to the province-chilling ritual, which is handy for your cold-blooded forces.)