Ok its very simple yet it takes forever, you log the quest from the one guy then kill all the larvae, then you keep killing from the same pool until the monarch/matriarch spawns, there are 4 pools and the farming generally takes about 10 hours with a full group (you need a tank and healer most likely)
Casters get-
Totem of Avhi
225 power
25int
15dr
45ac(45 or 55 i forget)
Im not totally sure what tanks get but I know that its a 1HS with 200hp and 725ish damage, and for melees and healers I have no idea!