We need an Eastern themed caster

[MikkoAkure]

I don't recall them ever making such a distinction. Kyokuho's explanation in the level 65 quest seems to indicate that the charlatans are directly mimicking Kyokuho's grandfather's discipline for profit, not that they were a separate pre-existing one.

The discipline first arose in Yanxia, its secrets passed on from aged master to chosen student in the traditional manner.
[...]
In the nation of Hingashi, however, the geomancer's banishing and binding of evil has been misconstrued as a means to manipulate the land and invite good fortune, leading the populace to consider these mages as little more than advisors for aspiring merchants.

Kyokuho himself in Hingan, but the geomancy he practices is closer to the original since it's legitimate magic. What the charlatans are doing seems to be how the art is perceived as a whole in Hingashi.