singular units almost always do massively disproportionate amounts of damage against large numbers of entrenched foes.
That has not been my experience. I've taken higher than expected damage with a good advantage or not, gotten off lightly with even odds or barely won, and done better than expected with poor odds or simply gotten wiped out.
I'll try a campaign tomorrow against the insane AI and keep track of the battles.
Certainly it's been my experience, while occasionally a single troops will fail to kill anything it seems like better than half the time it will wipe out 3 to 4 times it's own value. Hard figures would certainly help pin things down though, especially since the matrix has apparently been tweaked in the last patch.
Not only is it an effective long term strategy it's the only effective long term strategy.
Then why have people complained that the AI doesn't expand fast enough on Center Mass, letting you take over most of the neutral countries?
I might be missing something but that seems like the same problem to me, fast expansion and spreading your forces thinly is the only effective long term strategy and the AI isn't doing it.
Keeping your army behind the lines and using singular units to counter singular units is just wasting resources by never bringing them to bear
So when an AI sends out singular opponents it is the only effective long term strategy. If you send out single units you are wasting resources. Are you assuming that you will never win a country with a 50/50 chance, so you can never get close to anywhere the enemy has units massed?
No, maybe I could have explained that better but sending out single units is by no means a waste of resources, some die to no effect but in general they pay for themselves many, many times over. The waste is in having a large number of troops in one location, either you deploy them and suffer tremendous casualties to little benefit, or you don't deploy them and they achieve nothing. By spreading your forces evenly across the entire map you can easily and quickly wear down any force the AI brings to bear.