Is it possible to force units to go to the nearest healing base when their health is low ?

i've searched and tried a bunch of things but it doesnt work fully, like "AutoFindHealingUpdate" for example but it only makes units return to base when idle, when they are in combat or doing something they ignore that module.

Need this especially for the AI, i wouldnt mind a method that didnt work for the player, i really want the AI to send his low health units back to base.