The other major problem when confronting Assaultrons is the eye beam, a huge, continuous laser blast that can easily take you from full health to death if you don’t get out in a timely fashion. The one benefit you have is that when it fires this attack, Assaultrons are relatively stuck. It can shift it slightly to the left or right, but it will lock its stance, allowing you to get to the side, behind it, or run away. It will even try to use this attack while on the ground with no legs, but its inability to move well will take the scare out of this Assaultron attack.
One tip that may help you if you’re fast enough is to throw down mines. The Assaultron will always try to close the distance, it will come even closer if you take cover. Use that to your advantage and set a mine before it gets too close, then back away.
