As You know sometime healers are super slow maybe you can put pokeheal signs in pokecenter maybe?
The only time the healers are super slow is when you are standing in a different "chunk" to the healer, they will never be slow when you stand directly on top of them, this will (hopefully) solve your issue :)
Or just buy the command /pokeheal http://shop.pixelmoncraft.com/category/101476
It has been made, visit /pokecenter
moved to approved
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