Strikethrough does ignore wards or there is another effect active. On this mob and several others that have strikethrouhg the tank is taking damage even thought i have full wards on him and they do not show any damage absorbtion. The best move on this one is like you stated burn fast, spam your heals and have the healers rotate their deathsaves. With the nerf he is not as musch of a pain as he was, still hits hard but you have more options.
I don't think strikethrough ignores wards. It just ignores all avoidance checks... not 100% sure on that one. The best thing to do on this is throw up death saves, heal your butts off and burn him down FAST. Once your in EM raid gear tho this fight becomes cake.
He was nerfed to 50% strikethrough, a shamman would not have made a diff if he still had 100% strikethrouhg as they would go right thru the wards. Spaming your heals by all of the healers on the MT gets you thru this fight.
Looks to have been nerfed to 50% Strikethrough
Thanks for the help