Last night I was doing an Ulduar run for some transmog gear, the group I was with wanted to do the General Vezax achievement for the meta (http://www.wowhead.com/achievement=3...ning-10-player).
I didn't really think much of it since I never had any problems previously so we started the fight with me as the only tank.
Not long in to the fight I realise I have a problem... no mana.
With no Sanctuary or Divine Plea and Guarded by the Light and Seal of Insight not working on this fight I found myself unable to do anything other than auto-attack and hope it was enough to keep his attention. When the Animus came I again had only auto-attack. We ended up wiping due to the DPS grabbing aggro.
Second time around I tried to save mana and used Holy Avenger for burst threat, which let me JUST keep him on me with auto-attack for the rest of the fight.
At 85 it's a nuisance, but for anyone trying this at 80 I'm not sure a Paladin tank could do this anymore.
Is there something I'm forgetting that could have helped or is this total oversight by Blizz?
(I don't blame them and to be honest don't expect they'd fix a single achievement in an old raid instance, but having Guarded by the Light partially working on the fight would make more sense).