Tactics for playing as the Dwarves.

Returning to the topic of the importance of the "Sharp Mind" skill. Take a look at the replay; it seems the player's hero had "Sharp Mind" because the hero moved before the Knights of Isabel, for example. And this affected the course of the battle.

Regarding "Sharp Mind": In the replay I posted, the gnome doesn't have the "Sharp Mind" skill; he has "Empathy." Therefore, the positive morale effects triggered on high-initiative creatures moved the hero forward on the turn order scale, causing him to move before the Knights of Isabel (he got lucky). Also, since the gnome units have +7 morale (+3 from the Leadership skill; +2 from allied creatures and the hero; +2 from the "Runic Harmony" skill), and there are no artifacts or special buildings that increase morale, "Empathy," in my opinion, is even better for the gnome than "Sharp Mind" and spellcasting combined. Moreover, he doesn't need to take any extra skills specifically for it – Education and Leadership are always good.
The "Sharp Mind" skill itself is useful, and if you have Logistics, it's worth taking. But personally, I can't adapt the known benefits of this skill (Logistics) to my playstyle, so I prefer not to take Logistics, even for demons, in favor of "Fast Gate Opening." If you play in a way that you can't do without Logistics, then "Sharp Mind" (especially for a Chaos Knight and sometimes for a Dark Mage), "Sudden Attack," and "Death March" are skills that deserve equal attention. Is "Death March" really worse for the gnome than "Sharp Mind," allowing Erlangs to immediately cast the "Rage" rune during a castle siege, or "Sudden Attack," allowing dragons to teleport into the enemy's ranks with the same rune? It's debatable... not always.