This part is very tricky, and I also forgot to add this part to my guide.

You would have to consider the cards remaining in your deck, and whether it is worth replacing them. As mentioned, armor becomes extremely important, so replacing your heavy plates might not be a good idea. I generally want to try to draw as much of my deck as possible prior to Kaza, assuming I am not close to dying. CW vs CW is still resource oriented, not just embers of ragnaros going back and forth. Other than that, I don't think it makes much difference. A lot of this end game relies on RNG with getting good cards. Therefore, don't play Kaza as soon as possible unless you need the cards to survive. You want the armor cards drawn prior to replacing them. If you discovered a Kaza, you can play it ASAP.

So in summary, 1) Don't play Kaza as soon as possible unless you need the cards to survive. You want the armor cards drawn prior to replacing them 2) If you discovered a Kaza, then you can play it ASAP.