[Autumn]

I agree, I do not mind if this buffs ends up being alitte weaker like 15-20, still have to consider the potential that this still can pair with other buffers or even debuffers.

I choose the numbers mostly to, in a vaccum, reach similar levels than a Rouge promo with its +5 base evade with Kenki in mind versus blotch. Though correct me if I am wrong, but isn't Kensei only the thrid strongest hit debuffer?

I thought it was
Priest-With lightshafts and possibly staff too
VA- 16-19 debuff depending if blotch is spirited and
Kensei- 10-15 depending on Katana master

or did you simply not consider Curate/priest as a supplement to dodge build? Genuinely curious about your insight.

I'll try my best to explain my viewpoint but ultimately its just an opinion, Light Shafts are pretty good but they're ultimately voluntary too, you don't have to stand in a light shaft unless the priest makes it their mission to do so, additionally the application of Kenki is a part of Kensei's bread and butter combos, wazabane, in addition to that you have easy access to Fear via AF and L'au Dela where as Curates generally don't get access to fear quite as easily. There is also locking guard in this case to consider but it isn't unlike priests can't use swords either I suppose.

VA is a different story but I would consider VA the dodgiest class in the game from a pure numbers perspective.