1) only in the magic tower, in the military academy, and... I forgot the name.
2) depending on which artifact you equip.
Statistically, it turns out that approximately every 10th parameter is chosen by the player, the rest are chosen automatically... so there is not much of an effect.
And as for... Knowledge or strength? There are only a couple of such artifacts, and they are not easy to obtain (like dragon artifacts).
You should always develop a balanced hero... it happens automatically, and if some skill is clearly lagging behind, you can adjust it using the methods mentioned above. :smile25: