Going to start a flame war on that question..
In my opinion, while learning the fight, its better for you to be able to take 2 hits from Vezax and live...imo that likely means EH.
Yes, alternating shield-wall and last stand (with harder heals/hand of sac) makes it doable every minute. Last stand coupled with GS (will be off CD in time) is plenty as well...larger HP and stronger heals is great.
Not kiting the surge amplifies your DPS and steadies the fight, makes it much easiar in my opinion. I have not yet tanked 10man, but I'm going to try and not kite tonight.





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