Will DK + 4 Shamans be more or less viable than Pally + 4 Shamans?

[Aradar]

They have pushed very hard to make all 4 tanks viable in every aspect. I'd say you will succeed with any choice, it is better to choose which you enjoy more and fits your playstyle. All will have amazing aoe tanking / single target and ways to mitigate damage.

But I do love not having to rely on mana to tank / tank well. As long as I have 1hp I'm still running strong lol.

If you are running pally/4 shammies, you no longer have mana issues. I can now run full heroics without taking a drink thanks to some of the changes in the last patch, particulary, blessing of sanctuary, stacking mana totems and the new judgement system.

As for DK's, I know nothing about them but as mentioned above, consecrate is pretty awesome but add in holy shield and retribution aura, pallys have quite a bit of non offensive (you don't have to melee anything) damage dealing abilities making them very easy to use and hold aggro with on multiple mobs.

If all 4 tanks are able to do everything then doesn't it come down to what buffs you can give to your team. I think kings on everyone is far better than any other tank buff out there.

With kings now requiring 5 talent points as opposed to one before, most tanks are going to skip this.