First, let me get a common misconception out of the way.

"AST healing is weaker! Just look at the potency!"
This is mathematically false. Once you adjust the values of AST heals that share a similar function as their healing partners by their Sect, they actually come up to be almost perfectly equal.
And then you go on to say that their overall potency is weaker due to differences in Regen and SCH Embrace >.>