DISCLAIMER: I know White Mage is in an excellent spot right now and I'm not idly asking for buffs because I'm under any delusion it "needs" them to compete. It was the first healer I leveled this expansion and I understand full-well it's crazy strong.
However, I would like to invite you to consider the following before you start throwing bricks at me just for saying "give" and "WHM" in the same sentence.
The primary justification for returning Energy Drain to Scholars has been so that Scholar would have a means to dump Aetherflow charges before its cooldown came back up, if healing skills weren't deemed necessary to burn them.
In the same sense, White Mage has a very similar resource system with its Lilies, but instead of being on a strict timer, it simply wishes to churn out Blood Lilies as often as possible for Afflatus Misery. However, the only means it has to do so right now is through healing spells, much like our Drain-less Scholars did -- and ones on the GCD at that, which means even less opportunity to use them during damage pushes.
So if SCH has an offensive resource dump "for when healing isn't necessary", why not do the same for WHM and its Lilies? Just for QoL?
For instance... Water magic? That's been a notable gap in WHM's arsenal since Fluid Aura lost its damage. It could still fit the Lily theme (Avatar fans know what I'm talking about), and even with the push to make WHM more Holy-oriented, we still see watery oGCD skills like "Divine" Benison. And with the lorebooks confirming Cure is Wind-aspected, we can't even argue "waters of life" for this, so it's just... weirdly missing.
To be clear here, I'm not suggesting that WHM necessarily even be "buffed" by this in any numeric sense. You could make Water no stronger than Glare or any rank of Stone, and just an alternative instant attack to spamming Aero/Dia in movement phases if the DoT's already on the target, akin to WHM's own Ruin II.
Alternately, it could be an oGCD attack, which would probably be mostly self-balancing without even needing to rank up, since it would always clip the GCD off Stone/Glare.
I honestly don't care how. My only concern in this thread is simply in offering the means to dump Lilies when your oGCDs were already sufficient healing.
If you've read this far and still disagree, feel free to throw bricks now, but I can't really see why we make one thing true for one but not the other.