Secondary skills in Heroes 3.

Let me explain: Especially on XL maps, mages aren't very effective: 500 lightning damage in a late-game battle isn't that useful, but slowing, haste, and city portal... these can be used with a small spell, with a single expert magic skill (most often earth), and since I play as a strength-based hero with magic, I only take wisdom when I have the opportunity to get spells of levels 3-5.
P.S.: I save before every battle, dungeon, utopia, and canser...)))