Deceiver: I know, it's a damn good unit but I'd say 120 gold max nevertheless. Maybe even more around 100. At the same time, you could increase the ressource cost for the bow from 2 to something around 8.
Archer: The robe of cry is too good for normal troops. I'd make a lesser version for that one.
The added defence of the archer is just insane.
Light cavalry: Again: The robe needs a nerf
Heavy cavalry: Looks okay, but it seams strange that it has a base defence of 5. This becomes a reasonable number through the armor but instead you might want to give that one a lesser armor and a higher base defence (sum to the same defence)
Fey assasin: The picture is very large for size 1. The defence is very high, you probably did not equip them with the weapon you wanted them to be equipped with.
Bounty Hunter: Shouldn't he have a Patrol Bonus instead of Glamour? He is the Hunter of Spies, not the spy.
Summoner: Dual wielding Whips? Okay, it should work given the fire but ... I can't imagine it.
More seriously: The heavy research bonus and the forge bonus do not really make sense.
Blood Chalice: All by itself no big problem. Your magic is bad enough to allow some holy power ... but in combination with Sacrivicedom, an everywher-recruitable priest4 seams too powerful (somebody correct me it I'm wrong). Plus - he looks underpriced.
Ritualist: The Seduction ability seams to strong. 15 should be maximum.
Half of your starting army are "feary queens" - obviously the wrong number. Despite this, it's somewhat to strong.
Your commandes have lot's of leadership (the ritualist has much too much normal and magic leadership), however the units are demons, therefor you need undead leadership.
Your provincial defence only consists of dummy-creatures at the moment.
Cold 3 does not really fit. 1 is probably enough.
You have overwritten units from all over the game. please don't do that in a nations mod.
Some aspects of the nation are overpowered, others are completly missing.
Closer analysis can not be made before this is at least beta-version.
...Okay, I just saw, that you allready did an update. Still, most points are valid.
You should check your texts. Capitalisation is your friend.