Don't the rangers eventually kill them? Took me 4 tries to kill the queen using melee (maxed) Also isn't Rubys spec the 20%/10% not Emerald? Rangers attack the spinners so as to stop the queen being healed; It is your job, as far as I know, to kill or trap the defilers so they don't kill your Archers/Rangers :) And yes it was Rubies. I'm not sure what made me write "Emeralds" there :| Oh right, I got them mixed up. If you have money go try a test run at pest queen. Also, I remember the Defilers getting killed by something (Either the Knights or the rangers after killing the spinners) but they did spawn twice for me.