RRRaskolnikov
Goldfish
It's also typically a lot more advantageous to have 10 units with 20 exp than 1 unit with 200 exp. The latter is great if you're just trying to run a skeleton crew defense to minimize unit cost, but it does nothing in helping you go on offense. That unit is now a dramatic risk, a terrible dice roll can wipe away 200 of your hard earned exp. And that unit is still only going to attack once a turn. And of course exp -> promos follows an exponential function. You get a lot more overall promotions spreading that exp around, and then you have a lot of really good units that you can go on offense with.
I agree with all your post. But you can also settle earned GGs (Charlie behind a great wall comes to mind)