**Act 3 Chapter 1**
I used Mikayla and 3 support units to get this. You want to make sure your support units have the empowered skill and that Mikayla has the Alpha and Omega skills. I did this against a pack of wretches as they don't hide behind cover so the hit probability is high, and that you don't need to waste points moving as they should all be in range from the same position. At the start of the turn use all 3 empowered skills on Mikayla. If you have empowered 1 you get 1 AP per boost, and if you have empowered 3 you get 2 AP. Just have Mikayla shoot at the wretches. The shots don't even need to hit.
If you have at least empowered 3 you can just reload normally after your first 3 shots. If not, use the fast fingers skill on the third shot to automatically reload.