Thanks to your tip I figured out why my changes weren't working. I made a backup copy of "alienDeployments_XCOMFILES.rul" before making changes. The backup file had a different name. Apparently the backup was still being read in instead of "alienDeployments_XCOMFILES.rul" When I removed the backup entirely, then the changes I made started appearing in game. Thanks.
I wasn't concerned about equipment. I just didn't want 50+ enemies on a map. If I'm reducing the numbers, it makes more sense to me to have the entirety of a single Alien Rank spawn. Rather than one or two from 9 different ranks.
For example "STR_MONSTER_TERROR" has 15 different enemies. Megascorpions OR Giant Rats. But never both at the same time. That's what I feel "STR_OUTPOST_OF_APOCALYPSE" should be. And if not, I want to change it to that. IE [Luchador, Luchador, Luchador, Luchador, Male Stormy, Male Stormy, Female Stormy, Cave Girl, Cave Girl, Cave Guy, Cave Guy, Cave Guy] =OR= [Wizkid, Wizkid, Wizkid, Wizkid, Wizkid, Wizkid, Wizkid, Wizkid, Easy Rider, Easy Rider, Pinky Devil, Pinky Devil] But not both at the same time.
It doesn't need to be that particular Alien Rank spawning. How the game handles it under the hood doesn't matter to me. I just want that result when loading into a mission. I'm not sure how though. However I know that result is possible by the way "STR_MONSTER_TERROR" is random, then a random subset.