The 6.0 Spoils of War update introduced new set bonuses, tied to new armors, and the addition of a new equipment slot, called a tactical item. This is not an analysis of which set or tactical is better for each class, this is merely information on the achievements associated with collecting all the armor sets and tacticals. If you are interested in finding out more about gearing your character for end game content I suggest heading over to Merlyn's class guides (https://sites.google.com/view/merlyn-swtor/home) for more information on gearing yourself.