Would be better to just make some of the best promotions non-stackable (keep the full effect but after you pick one of them you can't pick any other).
Nerfing them would rob players the fun of actually making good use of them. It's not like we don't want uber promotions, we just don't want them stackable (thus making units too powerful and encourage xp farm)
Nerfing them would rob players the fun of actually making good use of them. It's not like we don't want uber promotions, we just don't want them stackable (thus making units too powerful and encourage xp farm)