Hey everyone;
This is my first actual post in this forum regarding exploits, and hopefully some of you find this useful. I don't see any of this information posted elsewhere in the forum (that I have access to anyway) so hopefully it will be of some help.
You are probably all familiar with the mission listed in the thread title. When you complete the garrison mission, its about a week to a week and a half before you see the mission again. To have the mission originally, it requires 3x 645 avg ilvl followers.
Here's the exploit:
When you max 3 characters to 655 (note I said 655 instead of 645), the quest is immediately reset, and available again, even if you have already completed it that week/day.
Hope this is of some help to you.
Merry Christmas.