WHMs and their toolkits

[Ghishlain]

You cant really reliably fit more than 2 off GCD skills in regen's gcd. If one of those is cleric stance, that means you get one off GCD skill to pick. If regen is sufficient, why use Asylum if you have options like PoM and Swiftcast?
If regen is not sufficient, why not E4E?
Also, keep in mind that staying in cleric stance longer, isnt necessarily an optimization.

Like how Asylum can be on cooldown, PoM, Swiftcast, and E4E can be on cooldown as well. WHM have a multitude of tools to use at their discretion and you should picking the right tool for the right job given what abilities are available. In some cases, Regen + CS + PoM IS the right call to make, in other cases Regen + Asylum + CS is the better call to make because the HPS requirement at that instance requires you to have 250 potency/tick of healing, not 150 potency/tick of healing.

Though explain to me how "staying in Cleric Stance longer isn't necessarily an optimization". You mentioned minor optimization in your post and if I wanted to optimize PoM into my rotation I'd probably end up doing Aero II --> Aero + Swiftcast --> Aero III + PoM ---> Stone III spam after I put Regen + Divine Seal + CS up.

Also, you either greatly overestimate E4E's use or you don't understand what it does. E4E is a 20% proc chance on the tank that can reduce the damage the monster does by 10% for 20s. This does nothing to the monster initially and needs time to proc so you may need more healing initially to offset the lower HPS requirement you'll gain later. Regen + E4E does not make up for what raw healing Regen + Asylum can bring to the table.

This would only be better than tetra if you were certain your tank would receive EVERY asylum tick.

As a healer, we all eventually will have to make assumptions about how our tanks play. As much as it's up to us as a White Mage to place Asylum in a position where a tank can make use of it, it's up to a tank to move in such a way where they will optimize their location inside Asylum. If they cannot, oh well. It still doesn't make Asylum less effective, it just shows either ignorance or apathy from the tank you attempted to use Asylum on and doesn't take away from Asylum's use.

you could make the argument you gained ~890 MP with DS + regen, 3.4125 cures * 442 cure mp - 618 regen MP. (plus any additional from being able to benefit from natural restoration)

Unfortunately, your logic is flawed.

Asylum is 100 potency/tick for 24 seconds. That's 800 potency over its duration.

Divine Seal ADDS 45 potency to Regen. Assuming you get a 36s duration (reapplying Regen as Divine Seal wears off) you get a total of 540 Potency over its duration (or the cost of 1.35 cures = 596.7 MP) on Regen alone. Of course Divine Seal doesn't only affect Regen but usually you want to Divine Seal + Regen ---> CS DPS --> Regen again as DS wears off on most trash so the DS benefit is usually lost when used like that.

Remember, you have to look at what each ability adds individually and inside a vacuum when comparing things. Using your logic, I can say Asylum + Regen = 250 potency/tick for 24 seconds for a total of 2,000 potency (or the cost of 5 cures = 2,210 MP) but that wasn't the point I was trying to make with my initial comment to you.