This is hard for me because I dont main AST. I play it occasionally but not enough to be an expert. But my thoughts on some of Yoshi-P's excuses as to why they didnt add another healer is because they are having a hard time finding another unique playstyle. I saw that their reason to add another tank is to have 2 MT and 2 OT. I think this could apply to healers as well by having 2 MH and 2 OH. The two MH would be Scholar and Whitemage. I think AST is a very good class and I enjoy it very much. Here is my idea to take AST out of SCH and WHM's shadow and make it its very own OH.
First of all we get rid of the stances. Instead we turn them into CD's. Let me show you some examples.
Diurnal Sect becomes an ability that lasts 30 seconds that empowers ALL of their heals not just Aspected. Gives them a Regen effect of 140 potency for 21s. If the target already has Regen on them, the Regen will stack but for half the duration but 250 potency(making it a more powerful Regen but much sorter).
So basically AST's are no longer in the WHM's shadow when they use that ability and in fact it enhances the WHM because if the target already has Regen it puts another stack of Regen but a more powerful one at half the time.
With that in mind the AOE one would have a Potency of 40 for 30 seconds but the stacked version would be 80 potency for 15 seconds.
This would allow AST's to strategically use their Diurnal Sect when partnered with a WHM for amazing effects or if they are with a SCH they could get the stacked effect but they would have to put both regens instead of just 1.
_____________________________________________________________
Nocturnal Sect will also be an ability that lasts for 30 seconds like the change above. It will have a similar effect but with shields. The shield will stack with SCH or its own if still on the target. The only difference is while there are two stacks of shields on the target they take 20% less damage from all sources. This may seem powerful but remember this buff only lasts for 30 seconds and Nocturnal is all about mitigation where as Diurnal is all about speedy HoTs
_____________________________________________________________
Now with that in mind I want to repeat that this change would require that the Aspected spells be changed to be the AST's own spells. This is where people can get creative and I would love to hear others suggestions.
Maybe when you use Aspected benefic it casts the same card buff you last used, onto the newly healed player.
Maybe Aspected benefic causes the target to move faster but it has a damage aoe that slows and deals damage to all targets near the target you healed. Sort of like a Gravity spell.
Maybe you can make Aspected Helios a targeted ground aoe heal so you can cast it on the ground and it does two or 3 heals. First heal being instant while creating a Halo effect on the ground and others who are outside of it can run inside to get the remaining second and 3rd heal while every time the heal goes off any enemy inside will also receive damage.
These are all ideas off the top of my head as these abilities will most likely be the main ones that would have to change with my sect changes.
__________________________________________________________________
I appreciate you all reading this I want you to know I am not trying to ruin the AST class so please keep the flaming down to a minimum. I felt that Yoshi-P put himself in a corner by the way he designed the class and if we can make AST its own kind of healer instead of a shadow of SCH and WHM then it would open the door to them making a 4th off healer.
TLDR: Changed AST from a shadow of SCH and WHM to being its own healer so Yoshi-P has an easier time balancing the healers to make room for a 4th healer.
Thank you again and I hope to hear some constructive feedback and not just flaming.