is it during a mission or is there a timed spawn place for them?
looking for the quickest way to kill them per hour.
shrek jokes are not very useful
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In the shrine of oryx mission, the part just after the long winding tunnel with the pulsing blue light. You come round a corner and there's a few dregs fighting some acolytes, keep going until an ogre pops out, kill it then die, the checkpoint should be just as you entered the area :)