Since there is no official thread for the 10man bosses yet I thought I'd make one for people who are going in to test on PTS.
Please post all your findings, concerns and things that you may think are bugs here.
-Caccooned Souls have the same HP as the boss.
-Molten Blast is hitting for 380k+
-Stun was happening too often and tank would lose stacks.
-The Heat stacks are cleanseable.
-Seems like a super easy boss after you kill the Heat stacks pillar.