Fortress versus Necropolis.

Yes, these are drawbacks. You have to re-blind the Jarls and summon the Phoenix each time, although you shouldn't let the Phoenix get too close to the Banshees. But usually, the Phoenix takes a lot of damage from the Behemoth. What can you do? Suggest your own options.

There, Chaos and Light can both be present.

Again, it's a headache. As an alternative, you could take Zoltan, or something that provides magic resistance, like a couple of those same dwarven items. You could even consider taking Light, which is also interesting. But we can't take Luck anymore, and without protection, it's impossible. Yes, and the effectiveness of Chaos drops sharply as the number of armies increases, and the dwarf isn't such a great Chaos unit.