If they are all from the same faction, it won't add much variety. But I think it's worth separating them into "good" and "evil" factions.
For example, if the AI can use combinations like: Inquisitor - Light Unicorn, that would be great. You can increase the weight for the chance of these combinations appearing.
Одиночные: Завеса срывается, Посол, Последний рывок, Эхо Пустоты
Кампания: Империя Единорога
Существа NCF
Орден Порядка: 1
Нейтралы: 1 2 3 4