if you thinking about the AI, who uses it is in the trigger. there are 3 flags, the last 3 numbers, they are EMH, so 1,0,0 on the end would mean easy only, 0,1,1 would mean medium and brutal, comman thing used there to send eg, 2 rhynos and 2 flaks, for easy, or 3 rhynos and 3 flaks for medium/brutal
He means [Easy], [Medium], [Difficult] in rules. Which AI diff uses those? Well, no idea. Do a test by setting two of them to ridiculously high values (ie Groundspeed=10 or 0.1 ) and observe.