well there are 3things you need to consider for that Bh...
Killing the required amount of mobs(quest will pop out)
in the 1st valley the pillars(immune to phy damage) on the left and the right side and then the boss so you could enter the right valley(where the queen is)
again killing the right amount of mobs in the valley where to queen is, so the quest pops out that it has been done.
for you i think it"d be the right amountt of mobs..