Molo'd today as an 86 Mage with just under 2k AAs, J2 merc. Sent pet in and let him tank FMotG and had him pick up his adds as they became active. I was about 70% mana and Merc was around 50% just as the last Golem died, then on to FMotG. I was able to land fire based spells rather easily but pretty much kept to my normal strat for taking down mobs with a crap ton of hps and thats just to let my Pet and Rumbling Servant do all of the killing while i just sit back. At about 50% my Mercs mana was steadily dropping so i kept toggling from reactive to passive, I would let the Merc cast Promised/Elixir then set back to passive...good way to get your Merc's mana up mid fight. From start to finish fight took 20mins. Hope this helps and good luck on the Fabled hunting!
Dropped :
Fabled Ancient Prismatic Warsword
Fist of Pummeling Prowess
Stinted Velium Drapes x2