The aoe doesn’t seem to be that big, nor does it stunlock or flinch enemies. In the video, the miko still had to put up a safety wall to avoid being hit. I don’t think Sadhus can stay in OoB while in the Hamaya field.
Clap, on the other hand, seems promising. Extending the duration of magic circles is a pretty big deal! Increasing the duration on safety zone can change a lot of things. May be possible to have some ridiculous invulnerability time by layering it with Sterea Trofh.
Kagura Dance may or may not be worthless to Sadhu. If the holy attribute damage applies to OoB, now that would be an incredibly powerful combination.
Now I’m kinda regretting going the Bokor2Sadhu2PD route. Though maybe I could go Miko instead of Bokor 2? Hehe, probably a bad idea x3x