#1: Mount up after a fight and rush toward next pull
#2: While I'm running, I set skull and X with my /SetIcon macro. Typically, you want to mark healer first, then mobs with AoE/CC or annoying mechanics.
#3: Shoot Avenger shield at the rightmost or leftmost target (preferably the side with the most spell casters), and run in with a well placed HoTR on the remaining adds. You should have a nice piles of mobs at this point that is ready to go down quickly
#4: Use Divine protection and your trinkets at the beginning of every fight. They will be back for next one
#5: Unless you're 100% sure this pull is going to go down easily, use GotAK preemptively at this point. With a 3 minutes recast, it will probably be back in 2 pull, and you rarely get 2 nasty pull in a row
#5: keep spellcaster targeted and be ready to interupt anything they cast (Arcane torrent, hammer of justice, and avengers shields can also be used when there is more than 1 target)
#6: If nothing is dead when GotAK wear off keep a finger close to Argent defender and lay on hand. You can also use bubble for 1-2 sec without losing aggro (click it off after), however, I usually save that to shake off the nasty debuff (like the one from Archon in ZA)
#7 Lastly, make sure you're using holy shield every 30sec (mine is macroed with HoTR since you want it up against multiple mobs all the time), and spam Word of glory unless you have faith in your healer.
If you use all your cooldown, you should be able to survive every fights unless people decide to afk or are just plain terrible ...and even then, you're usually fine.
If you do end up wiping and people point finger at you. Use recount the post the number of interupt and dispel..it's usually enough to make them shut up (when they realize you were the only one interupting the flamecaster, and that no one dispelled the debuff, they will shut up)