AST buffs DO NOT STACK

[Sylve]

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Nothing to do with limiting viability, everything to do with SE not wanting AST/AST to be the ONLY combo because they can give +30% damage to the DPS on a short cooldown if the cards line up.
Id say its working as intended.

IMO, Regen and Medica II stacking is OP and should be limited to one Regen per target and one Medica II per target.

If they do not want to drop that particular bomb on us, Then letting this happen would be preferable:
}SCH-A casts Adloquium on Tank A for a 2000 Galvanise.
}SCH-B casts Adloquium on Tank A, refreshing the existing Galvanise to full duration and improving the Damage Nullification by 50% of the second Galvanise Effect.

Basically, Galvanising a target, through Adloq or Succor, would simply improve the existing effect. However, i would add the caveat that you can only enhance an existing Galvanise ONCE. The Effect must then wear off or be consumed by damage before you can strengthen the Galvanise again.

Naturally, such a system would be extended to include Nocturnal Sect Barriers, working in much the same way.

This would allow any combination of Healer Job to compliment one another. While naturally, having 2 different Jobs is the most optimal way, getting a DF of double AST or SCH doesn't screw you over nearly as much as it does right now.