80 NEC here,tried to solo this one today and only able to drop it to 55%.I got every pet AA(up to SoF) maxxed and have Fortify Compaion and Companion's Blessing too,tho I dont have any corpse nearby to WTD for additional DPS.Pet has fullset 76+ pet toys,CLE+SHM buff and a cheap bazaar Cloak (Treachery something).After I failed,I /ooc asking some helps and donate 80K to lure a 80 raidgear SK to come.Lol and he can solo Brimstone no sweat(EPIC 2.5+DISC). Luckily,it dropped the Pet Focus this time.Just parse the new pet on those AG Golem,although its a short parse but Golem's average hit is 40 damage less on RS pet.Definately better tanking ability I would say.But it seems that if there is a new mod2 cloak on a RS pet,the cloak surely doesnt have Shielding mod on it.Because Golem's min hit doesnt change at all,still 513.Might just some DoT shield and Avoidance on cloak. Anyway,some infos to those trying to camp here.Brimstone has a max hit of 2349,total HP around 150K(parse shows-- me:42841 + my pet:24283 = 67124 damage done to Brimstone,brings it down to 55%.So 67124*(100/45)= 149,164.)So,really need some luck if you are a NEC trying to solo here.Easy to MAG I suppose??hehe hope these numbers help,good luck