Balanced Units - A minimal balance mod for units

Within the framework of some other mod?
Regarding the changes:
1) Yes, a permanent bonus to defense is more reliable than agility;
2) 100%, of course;
3) It's better to upgrade Nightmares than to keep buffing them;
4) I'm not sure about this one, I would increase it;
5) It's generally difficult to get any benefit from a chance-based ability in combat, so let's leave it as is.

I don't feel like making any more mods right now. The appeal of this "global" mod lies in its simplicity and ease of use (a small number of changes), and for me personally, it's that it focuses on my favorite topic – units.

For other global changes, there's the much more extensive WGE mod, but it changes the entire gameplay.

Added 10 hours 53 minutes later
Rajams can be given +2 initiative and +5 defense (instead of +2 initiative and agility).
Nightmare's upgrade can be given 10-17 damage (like the Alt unit) and the aura can be left untouched.

I wouldn't say so. A 100% chance ability is essentially an unblockable attack... Although I would leave it as is, the defense ignore of the regular upgrade is too strong, it needs to be balanced.

Actually, with a 100% chance, the ability is much more useful than some kind of unblockable attack.