>>536187395
I did it two months ago so my descriptions will be a bit fucked but

1. Make a trial account warrior Kul
2. Go start the War Within main story questline in stormwind, skip cutscene, go to the docks, skip the tutorial
3. Turn in the quest that's in front of you when you spawn in Bolarus (For some reason when I skip this, the teleport to and from the next step wont always spawn, dont know why)
4. Go find Magniand get the Heart of Azeroth, teleport back to Bolarus
5. Go onto the 7th expedition ship and turn in Uniting Kul Tiras
6. Go to the Stormgarde table and wait until the Battle for Stromgarde is active, pick up the quest, run it on heroic with a group (search in the custom group finder, there is a handful of dedicated people who will always run it on the first day the quest goes live)
7. Repeat the above as many times as you can for sanity

I got the full set in one day across 14 characters/trial characters, not counting the day I spent setting this all up. The set up sucks, running it is not that bad, just be online the moment the quest goes live and people will run it back to back. Of all the stupid grindy sets to get I have never regretted this one at all, its divine.