User blog comment:Slashingstrike/AP Item for Tanks/@comment-4091261-20161025152946/@comment-15077371-20161025153711

Well if you thnk about it late game you need lower cooldown for teamfights. You would pretty much initiate with a spell and after 5 seconds you would need the healing again. Its focused on keeping you alive when you have very low health

So its questionable how the passive should be handled