During Atlantis Rises I run only 2-1-2 N on autofarm, burning through at least 30 WE flasks that I gather during the month (barely spend them elsewhere).
It allows me to farm ~2000 backpacks. It’s over 20 days worth of training in two camps on Uncommon Training (lvl 2). One of these gets all the backpacks I then gather during the month, which basically allows it to run long enough to last until next Atlantis. The other two camps are on TC11, queued for hundreds of days already (if you run two TC2, you have problem with excess of recruits).
Then whenever I pull any hero that’s worth maxing fast, I can take out hundreds of heroes from the camps, half of which are 2 star feeders, 2.5x more effective than 1 stars. The only issue for maxing then is ham, because this way you do not have a food bank, but it’s definitely quicker to gather ham afterwards than to forge feeders.