I'd rather not argue about the AI; after all, this is the only game i know of where players play (and want to play) against it! In every other game, the ai has been easily defeat-able (which is what led to the creation of AI war).
See, you're still thinking in the old way of playing (that is, realizing that the individual units are more valuable but still trying to use them in numbers and ways like they were FA units). If i purchased the Fatboy, i might order an engineer to assist it and harass with it. If i ordered the 10 rokheads i might split them up into several groups of 2 or 3 and use those for harassing, because they have the equivalent strength of "several low-tier assault bot groups". Also, something that took me the longest to understand is this: Use your ACU! it can take a ton of beating and deal a pounding too, and if you spend as little as 3 research points it becomes even more effective. Then you can do much more raiding on your opponent with your offensive units (or maybe even back up your ACU if you want), and force the enemy on the defensive. Try watching the last game in
http://www.gamereplays.org/supremecommander2/portals.php?show=news&news_id=590061 ; While in the replay the opposite guy wins then who should, it gives you an idea of some more interesting strategies to use.
If you go fatboy rush, then id' keep one or two at home for defense then harass with others. Minor experimentals are like the new tier 3 units, use them that way
