Leveling up for Erling:
3 spells - wisdom, secret knowledge, mana restoration, or arcane knowledge.
3 luck - soldier's luck, lucky spellcaster.
3 chaos - fire lord, pyrokinesis, secrets of chaos. If there aren't any good level 3 spells, or mana burst.
3 racial - earth rune, great rune.
3 defense - (if going above level 21) to battlefield protection if there's a resurrection rune, if not, then to healing, and as for battlefield protection, I'd also take reflection, and in both defense and luck... just in case we encounter a berserker.
3 leadership - if going for maximum, up to inspiration))
That's it...
