|These achievements are easy to get just requires tedious farming. I've noticed that a lot of people have trouble with these not because of the difficulty but because they're confused as to how they work. Well no worries i'm here to elaborate. |
Each officer can aquire 1 ability per battle and earn you a total of 4 abilities. To earn these abilities certain requirements must be met such as kill 50 enemies, defeat 3 officers, etc.
To check the requirement go to the team info menu and if they can earn an ability there will be a menu called "Ability". Go into it and it will tell you what you need to do.
To check your total level of abilities go into the ability menu and off to the right of the name of the ability there will be a number. Add all the numbers up and that is your total.
Tip: Here is the setup I used to farm for my ability gains. Use Wei Story Mission 2. It can be completed in about 5 minutes, has plenty of easy to kill enemy officers, and enough soldiers to meet any kill number requirements.