Pros and Cons of each Healer Role

[HPDelron]

Still, it's unreliable. Like Parry..

Parry is a terrible analogy. Parry happens or doesn't happen simultaneously with the damage, in other words the decision isn't made about if the mitigation happens or not until the mitigation is needed. With Aldo, once it crits it gives you information about the upcoming hits.If an Aldo crits you know ahead of time if the upcoming hits will be mitigated. Once you crit, the tank has 12k Shield on them and you know the next 12k worth of damage will be mitigated. Since you know this for sure you can act appropriately. Redirecting your time and resources if the extra mitigation afforded by the crit gives you room to so. If you don't get the crit you can act like you always have. Since the information on the shield size comes after a cast and as part of your normal healing activity, the crit is always actionable.

With something like parry it never gives guaranteed information about the future. The tank can have some variety of fantastical "Super Parry!" with a 90% chance of occurring that mitigates all damage and heals them to full and you still can't rely on that the way you can a shield. This is because you won't find out until it's too late. Parry and things like it are not readily actionable. At no moment can you say "Oh yeah. We don't have to heal that damage Super Parry! will take care of it"

You also can't try to "Fish" for parries, that is willingly take a bunch of 0 damage hits and save any parries you get for later. You can with shields. You can cast a bunch of admittingly MP inefficient Aldos that do nothing, in hopes of getting the crit. Even when the target(s) aren't actively taking damage. Then if it crits, you still get value from that crit so long as damage occurs in the eternity that is a 30s shield.