Healers and Spell Speed/Piety

[RylaBee]

I wish Spell Speed was viable as an option when melding materia. It makes double weaving abilities difficult tho and you don't see hardly any return with the one weak DoT all healing classes get. Does it even make your HoTs stronger. The math I've seen says it isn't worth it and it just feels like an oversight like most things healing related.

SS makes both DoTs and HoTs stronger (not ticking faster, just each tick stronger).

This makes it usefull to WHM, since you have 1 DoT and 2 HoTs (Regen and Medica II), spamm Glare faster and WHMs don't need piety.

SS is most useless for AST, since your nuke is already shorter cast than other healers, and it will not help you with card-handling at all.
Also, AST have biggest mana issuest atm, so its Piety (after Det/Crit).

With SCH I'm not sure. Does SS affect strength of HoT from fairy AoE heal and/or ticks of Fey Union?