Quote Originally Posted by Yorumi View Post
Given the tooltip it makes sense to me that kaiten wouldn't affect the dot on higanbana. The skills that increase dot damage are skills that in some way increase damage in the calculation, they don't increase the potency of the dot per se, they increase the caster's damage or the damage taken by a target(like raging strikes, slashing debuff etc). Katien said increases the potency of the next weapon skill. Well higanbana's potency is 240, the dot is an additional effect, not the weapon skill. So much like crit skills and ammo don't increase dot potency I doubt kaiten will either.
That does make sense. I was actually thinking of something like Doton which is affect by Kassatsu, but that is pretty different especially since Higanbana has direct damage with the dot as additional.

I did just watch Veri Merry's video but i didn't hear any mention of this confirmation. He doesn't cover any such interaction as far as I can tell, unless it's in a different video.

Source: https://www.youtube.com/watch?v=HGyWVo91HBE