Well, you're quite the wit! ;)

Let me explain for clarity:
A combination of high attack and a large number of units results in a significant amount of damage, which is what I refer to as offensive potential.
And I didn't write anything about angels in this context.

Building an army of angels is more complex than building an army of champions because it requires a lot of resources and money. Champions only need wood and stone, a considerable amount, but in my opinion, gathering these resources is easier than gathering "expensive" resources (sulfur, mercury, gems, crystals), and it's also slightly more profitable to trade them on the market.