Haven tactics.

A dwarf can be developed towards either Chaos or Light, with roughly equal chances for both magic types. If I knew the opponent was going for Chaos, I would have chosen Darkness, but if it turns out they go for Light, they will be able to counter your mass spells with opposing spells. Light looks good; it's more versatile against a dwarf. You could try taking "Seal of Light"; if the dwarf goes for Light, they will have a hard time. And runes can be a real surprise... However, there's nothing you can do about them. I sometimes also take Vengeance and Readiness for humans. This creates a kind of killing machine, the only downside is that it might not have enough levels for magic. And you'll probably have to forgo Logistics... That's why I don't develop this way very often; usually, I focus on either attack or defense perks. But I always consider Logistics essential. The dwarf probably won't have it, so by taking Logistics, you gain an advantage, and your development will be faster.