How to make AI attack another Ai.

First of all I’m completely new to Unreal… and I’m desperate for help.
Right know I’m working on a Tower Defense project and got stuck with enemy AI.
I want to make an AI target and follow another AI, attack him and finally kill him. Did some research and only got AI move to Player, coding something related to Player Inputs and figure that this would not work cause the target isn’t a controller character, just another AI who moves along a Navmesh to the final destination (AI MoveTo).

Another question would be related to sprite rotation according to AI movement. I can’t figure out how to change the sprite if the AI is moving Up, Down, Right and Left… He moves along the axis only facing the camera.