Next healer class released should be

[Seraphor]

I'd rather Chemist didn't just copy NIN mudras.
I also see every other Chemist concept using mudras to bestow buffs like AST as well, and I wouldn't want that either.
People already complain that healers are homogenised.

No, use the mixing concept for their core healer kit, so that it can't be compared to WHM, or any of the existing healers.

OGCD abilities you weave to grant your core healing skill additional effects, +potency +regen and +shield.
More details in the topic in my sig.

Edit: why is my sig not working?
Here it is: https://forum.square-enix.com/ffxiv/threads/416487