Legionfall Commander

How do I farm rep with Armies of Legionfall?

Completing content mostly related to patch 7.2.
The bulk of your rep will come from World Quests on the Broken Shore (75 rep each) and turning in 100[currency=1342] for Broken Shore building construction (150 rep).

There are a variety of larger rep activities, but most of them are one-offs or time limited (World Boss quests, Legion Assaults, Raid World Quests).
If you want details on these check out the excellent wowhead guide here

So if you're farming your way to revered for flying get into those world quests and building construction.

Week 3 of 7.2 - A further edit to this - as time passes more of the Broken Shore story line will open up, and the rep from this chain is significant (1500 per quest for many quests). So as patch 7.2 gets older the World Quests and building construction will become less relevant to your rep farming and it will be quicker to get rep by completing the quest chain for Breaching the Tomb.
I've just hit revered (Week 3) so now have my flying and will stop farming rep and just get to exalted over time as the storyline progresses.

Note that Breaching the Tomb is no longer required for Broken Isles Pathfinder, Part Two, i.e. flying.

Update 7th April 2017, due to bugs and the timing of invasions precluding many players from participating, Defender of the Broken Isles is no longer required.

The achievements are now:
Broken Isles Pathfinder, Part One
Explore Broken Shore
Legionfall Commander

Do it on your [race=1] toons with [spell=20599] for faster progress. Remember to visit Darkmoon Faire when its in the town for [spell=46668] and get even 10% more rep.