I don't see why he's ****ed? I agree with Kwesi. Naj'entus, Supremus and RoS are complete jokes to be fair.
1. Naj'entus is nearly impossible to whipe on. As a warrior I can tank him with leather gear on without problems. So the enrage timer is nowhere hard to reach.
2. Supremus? To be fair he's free loot? You only see one vulcano from time to time?
3. RoS? When we kill him I do not even reflect Deaden and we kill him a min before we reach 0% mana? So that fight is also free loot.
About Mother? I haven't been one-shot once due to RNG. The only problem I have faced is lag of healing! She is supposed to be able to nuke 20k of your HP every 2 second if you're really unlucky. To avoid this part use a warrior tank, which has Last Stand, Moroes Trinket and shield wall - then you're totally fine! If things should go bad, then you have your Feral OT as 2nd threat and he takes over the tanking. Remember to have SS on the warrior tank.
Council? Last night we killed them with one dead in the overall fight. You do not need to stack any classes, you just have to instant move from flamestrikes/blizzards.
I like the challenges to be fair.
Demons from illidan can be annoying, but they're not impossible! We have never whiped in demon phase due to them reaching our warlock tank - NEVER.
Of course people can die during that phase, but they're actually just a bit of a challange in fight, which is so straight forward?