First day of the festival my priest + 4x blood dks went in and wiped 15 times before i gave up.
I always failed because the knock backs were knocking 1 or 2 into the pool to the right unable to get out.
It was hard to see the AOE thing on the ground with my Tauren dks and lots of ads, it was hard to avoid.

So next day after getting enough points for a big weapon upgrade i went back in and downed him first go.
Priest was mana dry by the time ahune came back up for round 2 but dks managed to power through.
This time used my follow key alot and just constantly tab tageted every ad whilst moving every 5 seconds
Dks did not get blasted into the pool this time.
I used army of dead for all the ads and then popped every cooldown as soon as your able to nuke ahune.
Priest constantly had shield and fade on the spam bar.

Also got the Frost weapon in the satchel shame it was on one of the Dks
Hate them dam stachels, last year 1 shammy got 4 mounts in the bags from brewfest, but since you cant give them to another alt they were wasted