It is also interesting that, in principle, the power of gnome magic can easily be as good as, or even better than, the magic of wizards.
The principle of a successful war against the Academy using gnomes:
Defense - fight to the last - resurrection rune
As quickly as possible, close the distance with the Academy's weakly defended units. Leadership - runic harmony, Light magic - general acceleration, punishing strike (general).
Choosing a starting Dwarf will prevent you from falling too far behind Hafiz.
Try to catch the moment when the gnomes have third-level runes, and the Academy hasn't had time to gather enough resources for mini-arts, then everything should be significantly easier.