There is another aspect to BAM that puts it well above other, slower building armies.
For TH9, the ghost bases are where the real spikes in loot come from. And, they are like aces in a blackjack shoe. They rotate in every 11-16 hours.
If you have a quicker building army, then you are actively searching through more bases more often. This gives you a greater chance to actually find those ghost bases as they come back up from being shielded.
The less time you are watching your army build and the more time you are hitting NEXT the better off you are. It's pretty much sub 200 farming all over again, but without the fear of getting pushed up in cups if you log off.

