I've won this fight a few times with a SMN in it (I'm usually on BLM though)
The most important things are;
GTFO of the way Melee!
-Only the 2 BLM (Any RDM if you have it) should be down in the circle when the main man is being burned down.
GTFO of the way BLM's!
-When he hits his magical %ages one BLM should be near the entrance doors (the one with hate) the other's should be over near the staris (Where the melee are up the back of)
-When they do pop, Start with Sleepga, 20-30 seconds later, land Sleepga II.
-BLM near the stairs be ready to sleep ASAP if the other BLM gets hit by a bad TP move/Resists.
Hit them Hard and Fast
-When the Mini's do pop The 2-3 DD and their Supporter (We use SMN, Who Buffs melee prior to pop) Off the little brown nosers before the first sleepga wears off.
Other then those 3 things, it really shouldn't be much of a hassle to win the fight.
BLM x2 SAM x2 WHM SMN
BLM x2 SAM RNG WHM SMN
These 2 setups shouldn't have much/any trouble if everyone does their job correctly.
Equivocator: 75 PLD.
99.4 Fishing, 100+3 Woodworking.
60 Alchemy, 60 Smithing, 60 Clothcraft, 60 Cooking, 60 LeatherCraft, 60 Bonecraft, 60 Gold.
Lu Shangs Rod: O Beast Masters Unite. (Duo Camps)