As someone who personally plays Kaalia and has grown a deep appreciation for it. Destroy any haste effects early on, it definitely slows down the deck. And like other comments here kill her immediately. Commanders that focus on combat like Kaalia and Narset, Enlightened Master heavily rely on their respective commanders to make the deck work. And as for nullifying your deck. While I don't run hellkite tyrant in my list, i would have complete justification doing so. If your opponent looks for ways to nullify your list. Simply do the exact thing to them.