The minion SHOULD BE wounded for the “if anything is healed” ability to proc. There IS differentiation. There is no ability that procs on “healing is cast”. How do you even get to the point you believe it’s not true?
If not, prove otherwise. What example of a minion did activate on a heal cast on a non-wounded minion?
Actually, alomost any version of Heal Zir’An does really well against aggro. That’s her main strength.
It is an almost control archetype, which works fairly well against any aggro or midrange list, but loses to any real control list with big lategame threats. The reason to this is her lack of removal. The only nonconditional hard removal is martyrdom, which is an awful lategame play.