For my Sith achievement I used Traya, Malak, Vader, Revan and Palp. For the stealth and light side/ dark side survival, I just replaced Palp with R2D2. This was one of the easiest max crate rewards that didnt involve ships.
When you hit Autoplay, the enemy you had selected will have a fixed target, meaning the AI will keep attacking that one enemy. Sometimes this is what you want, but when you want to spread the damage, you need to tap on the enemy that has a target on them, after you hit Autoplay.
Darth Maul lead, Darth Revan, Malak, Bastilla Shan plus any other Sith, eg Marauder are enough. Change the 5th with any strong Jedi, eg JKLS and you are done ✅.
I did the sith and 10 invisibilities w/ Palp, Malak, Darth Revan, Talon and Dooku on auto from the start without touching anything, everyone melted and they didn’t get a single turn.