Originally Posted by Sarevok_Uldum
Edit: Commendation of Kael'thas is a life-saving trinket. I would definitly use it instead of Moroes on this fight. If you haven't farmed one up yet, get on it! 
Good luck with the kill!
Sarevok |
Suggesting Commendation over Moroes is exceptionally bad advice. If you're going to use Commendation, use it over Shadowmoon Insignia.
21k hp fully raid buffed is fine. Assuming you're completely buffed and the boss is debuffed, you can survive during stomp easily assuming you get healed. Properly staggering timers as you have planned is a natural move as well.