When I encounter in tactical battles any monster squad with several individual units, all of them have strange CR rating. For example, one time it was squad of three spiderlings. Squad has CR=24, and three (identical) individual spiderling has CR of 24, 20 and 16 respectively. Second time it was two bandits from quest, identical again, but first has CR of 10, and second - CR of 8. I dunno, is this influence anything, but it look strange, at least. 
