[Cohen]

Abysya is very weak indeed.
You can take points from heat and death.

You've to bring your provinces to heat 3 unless you want to waste 5 or 10 % of the income.

Your best mages are capitol only, and cost a lot for what they do.

Your infantry is very costy but its morale 10 makes them very breakable. Usually Abysya if rushed find itself to be forced to defend with Pretender and if it can manage to blood hunt his same capitol to summon 2-3 fiends. It happened to me in many games in maps with <150 provinces to get rushed. And you can't replace your loses even if you win at a good rate because your men costs 20 gold and 27/30 resources (don't look at humanbred light infantry, they die without doing nothing full stop).

This makes Abysya really weak in early stage, and is weak both in middle stage.
In late game if it has many devils and soul contracts could be well settled. But it has to survive.