Exploration Mission Master

Just to save folks from mousing over every requirement above, here are the related missions for each part of this achievement (reward type in parentheses):

Oshu'gun - Mountain of Spirits (Draenor Clans)
Stonecrag - Forced Eviction (Ogre)
Apexis - Pro-labor (Arakkoa)
Veil Shadar - We Will Fight In the Shadar (Arakkoa)
The Broken Spine - Backbreaker (Ogre)
Colossal's Fall - The Bigger They Are (Draenor Clans)
Umbrafen - Mushroom Mystery (Ogre)
Razed Warsong - Early Mover (Draenor Clans)
Sethekk Hollow - Fall From Grace (Arakkoa)
Ango'rosh - I See Dead Ogres (Ogre)
Overlook Ruins - Green Thumb (Ogre)
Daggermaw Flows - Boiling Hot Magma (Draenor Clans)
Burial Fields - I See Dead Orcs (Draenor Clans)

As of the writing of this comment, I seem to be getting proper completion of the requirements in
spite of the fact that I had previously collected MANY Zone Treasure Maps (on MOST of my alts)
from [npc=87365], and then, started seeing and completing garrison missions for said maps.

CHECKLIST for completion of Exploration Mission Master

Thanks go to @direpath for his listing of the actual NAMES of the missions needed to complete the
somewhat ambiguously named achievement criteria.

Apparently folks at BLIZZ still think it's FUN to do this childish crap... just use the damned MISSION names
in the criteria list, you losers! I had my fill of the
Constant Cross-Referencing Game
while completing the Treasure Missions. By the time I had [follower=465] on six alts I was actually starting
to recognize which missions I still needed to complete for that alt.

To simplify the process, I suggest you physically print out the following checklist. Just mark off the missions as you go.

Exploration Mission Master
Criteria Location - Mission NAME (Race)
Exploration: Oshu'gun Dig Site - Mountain of Spirits (Draenor Clans)
Exploration: Stonecrag Excavation Dig Site - Forced Eviction (Ogre)
Exploration: Apexis Excavation Dig Site - Pro-labor (Arakkoa)
Exploration: Veil Shadar Dig Site - We Will Fight In the Shadar (Arakkoa)
Exploration: The Broken Spine Dig Site - Backbreaker (Ogre)
Exploration: Colossal's Fall Dig Site - The Bigger They Are (Draenor Clans)
Exploration: Umbrafen Dig Site - Mushroom Mystery (Ogre)

Exploration: Razed Warsong Outpost Dig Site - Early Mover (Draenor Clans)
Exploration: Sethekk Hollow Dig Site - Fall From Grace (Arakkoa)
Exploration: Ango'rosh Dig Site - I See Dead Ogres (Ogre)
Exploration: Overlook Ruins Dig Site - Green Thumb (Ogre)
Exploration: Daggermaw Flows Dig Site - Boiling Hot Magma (Draenor Clans)
Exploration: Burial Fields - I See Dead Orcs (Draenor Clans)
.
.

So I needed this achievement for a while and was only missing 3 more, but the randomness made it really frustrating for me. I didn't really see anyone comment on this here, so I figure I post it here.

The way the books work now (at least from how I just tried it) based on what I read here is that in 6.2.2, you cannot use a notebook if you have a mission available to send out on your command table (though I didn't try to find out personally), BUT you can use a notebook to spawn a new mission if you sent one out already.

I bought 15 notebooks (all I had that I could buy at the time, since I did rely on some RNG to not mess me up, sinec buying 19 lets you have a stab at every possible mission), hearthed to my Garrison, and used notebooks one at a time. Over the course of 14 notebooks (spawned the 3rd one I needed on the 14th mission), I feel confident in saying that notebooks will never spawn a mission you already have in progress towards being completed when using a new notebook.

So I waited until I had all 25 followers free, and sent them out one at a time until my command table looked like http://i.imgur.com/MO1Fxu7.jpg.

When I had my 3rd mission spawn on my 14th notebook, I used a scroll to instantly complete it (since it was at 94%, as the achievement only counts if you succeed) it, it succeeded, and then when I used my last notebook, it spawned the same 94% one (I see Dead Ogres) again as I presume it's probably the only non map mission that could still spawn for me currently. It's possible that it was probably just a coincidence, though. I also happened to have all of the Draenor archeology achievements except for the "collect all the pristines" achievement, if that helps with anything.

In any case, if you're happening to be missing 1-3 of these left and you're tired of the RNG of using a notebook one at a time, hopefully my suggestion on how to go about this mission as of my post (6.2.2) will help remove the randomness from this. Now I can use my restored artifacts while working on Draenor Curator to finish the MOP achievements I have left instead of this achievement.

Happy hunting all!