The Chaos skill is terrible for a Dwarf; only the Rune Shield and Readiness skills are somewhat useful. If you want to develop the Chaos skill, you should only do so by retraining with a mentor. Chaos without education is not Chaos, especially when the spell only has a 30% chance of appearing. Summoning is almost the same, plus there's another problem: you might end up with only the Rune Shield spell. With a 4% chance, you'll most likely get it if you choose skills with the highest chance of appearing (Chaos, Defense, Mechanics). In other cases, there's not much hope. Retribution is generally suitable for any unit, but it's easier to develop for warrior races. You're unlikely to succeed with Imps. Perhaps the hero will die sooner if they have high Intelligence... Otherwise, there's no chance. Unless you get lucky with artifacts and the arrows hit early. In general, a Demon can slow down our troops at the beginning and then speed up its own with an aura, which would be a complete disaster. Whether you like it or not, you'll end up in a defensive position.

P.S. Chaos is good for a Dwarf, I agree. But lately, I've been disappointed with it; if you don't get education, you're unlikely to have a high spell power (I had only 10 at level 20 without artifacts or education, and there's not much you can do about it). At the same time, even with 5-7 spell power, Light is quite effective. And Divine Vengeance simply works wonders with minimal spell power. Damage over 1K is quite realistic.

Therefore, the conclusion is: Chaos is for a long game, while Light is more versatile and relevant at any time.

P.P.S. I don't play on random maps because they turn out to be terrible. On the original maps, you're unlikely to find several identical artifacts. Only if you loot one Utopia after another on the Outlands, but you know that you definitely won't be able to do that against a human player. I only bothered to collect a full Dragon set in a game against the computer, but I still didn't manage to do it.