Auto for potion doesn't work, it just says "Decreases the cooldown of the Potion skill to 45 seconds" unlike the auto for Battle Cry which says "Automatically uses Battle Cry when it's available"
Same problem exists for Angel feather Auto which decreases cooldown to 90 seconds.
Example to fix auto's
if unit health low use potion OR if any unit health lower than ?%, then use potion
use angel feather if 1 unit remains
Otherwise great game