These are all just ideas I got from the fact that this faction is supposed to be the most Mad Maxy so instead of fire and fuel it could be fire and aleph. The general idea is that maybe instead of having model swapped enemies with continuous health regen that maybe their weapons should focus more on area denial capabilities. For example the commander enemy type could still have cannon but but when the projectile hits a surface or player it sets on fire (the projectile impact damage would be less but the DoT damage would make up for it). The charging enemies when they activate their aleph ability could trail fire behind them and their weapon could be changed to a grenade launcher that you guessed it creates fire spots on the map. For the sniper enemy type instead of a teleport she could have some sort of buff that she gives to the AI like more health or damage. Also having a different animation for an execution could really help to make them feel a little different from the other factions.