It was Ancelyn (pls tell me if ‘naming’ is not allowed in this case - keep in mind it’s not negative, but rather positive as he encouraged me to do the same. In that case, I will edit my post and delete the name).
Why I’m mentioning this, is because this really is very effective. I didn’t believe at first, but when I tried, it really does make alot of gold without any effort (I just bought Glory of the ZM raider and Sylvanas mount with it ). The idea is to have as many chars as you can (I have 12 - every class at max lvl) with mission table on it. You don’t have to do much, as the basic followers will be unlocked with renown anyways (buy the token for renown 60). You will have the souls etc etc. just start doing missions until the gold ones start popping up. At the end of the day, you will have 2-4 (let’s say 3 on average) per 1 sending, and 1 mission is usually from 260 - 380 gold. This means that 1 routine will net you from 750 - 1000 gold, and you can do this twice per day since they usually take 4-8 hours to complete. Now let’s take my 12 alts, so this is 12*1000 = 12k gold from doing nothing in a bad scenario, or even up to 20k per day in a good scenario daily. This translates into anything up to 84k to 140k gold per week, and that translates to 336k - 560k gold per month from doing almost nothing.
What I also did, sometimes the callings are aligned or just super easy. This means that you have all 3 of them available in 1 zone for example, or you have 2 and really easy WQs are up. If you do all 3 callings, this takes maybe 10-12 minutes, and each calling box contains 2.5k - 3k worth of junk. This translates into 7.5k - 9k per character if all 3 are aligned, and if I multiply that by 12 since I do this on all my toons, you get 90k - 108k gold on just that day.
I’m not doing this due to other activities, but in roughly 2 months, I managed to get 2 million gold by doing this, so about a million each month for just passive playing pretty much. You can do even more if you got alot of toons exalted = paragon boxes that contain 3.5k - 4k gold, and if you get lucky, that’s not bad aswell I managed to get the 246 ilvl sword from ZM Mawsworn elites that sold for about 250k aswell, again pure passive play.
So yeah, that’s it.