I'm attempting to setup a farm of wither skeletons for their heads and I have the Skullsplitter axe (amazing way to get heads!) I want to put it in the autonomous activator to have it attack and get the beheading aspect of the weapon. The problem is it will need to be repaired. What is a possible way to repair it while inside the activator?

edit: I have another autonomous activator setup right click aiming at a thaumic restorer. so it sticks the axe in, it repairs, and comes back and I have a output for the skullsplitter at max durability(matched meta data), so it will pull it if it's fully repaired and itll go back into the attacking activator... but it's just so WONKY.