Prolly wouldn't be worth the cruor with more people. Though I'm not sure how much it drops without being in pt but I know a group of 5 get about 40-60 on the glowing mobs which take like 2 seconds to kill. (Ok exaggerated but still very quick kills) Plus 400+ exp for a kill I'm not sure I'd want to do it with more people.
Id rather kill with more people honestly. 7 was a nice number, I would have gone 8 or 9 even, but that gives more chest drops. If you have yet to get a Crour chest, with 7 people, 3 chests, 1600 Crour... each person.