I think they (either intentionally or unintentionally) changed Zek’vir for season 2 so the fight is always “Zek’vir??”. He was pretty easy at Zek’vir? before and significantly harder on Zek’vir??, but now both fights seem to use the “??” mechanics. I have several alts with the quest to defeat him, but there’s no way I’m going to learn the harder fight for each class. If you really want to do it, I highly recommend this guide: Let Me Solo Him (Zekvir Hard Mode) Shadow Priest Guide