Since no one has posted one and from the forums ive read there is a lot of confusion about this one. I wont mention any builds or things of that nature as play style, characters and abilities are up to the player to deem what works.
Its comes with out saying that you need to finish the story first.
2. get to level 80 or higher it will help make things easier in the long run.
3. If you do these online with a friend make sure that you are the one hosting, otherwise you will not receive completion credit.
4. Their are 100 PQ missions to complete
5. while in the process of completing those as you go, be sure to check your map and look for any Blue exclamation marks as these are missions that count towards the achievement. But might not show up in the list as you have to go and look for it. ( there is one that does not seem to count as it is against fellow ai time patrollers that puts you into a 3 vs 1 situation that can be frustrating)
Best of luck and happy hunting.