[Senna]

Evade buff that last for one attack; possible to bump that up to two attacks instead? It's pretty easy to just remove those buff with stuff that are 1 momentum attacks/skills or just a Guardian spirit/Youkai.

[renowner]

Definitely for Windtouched gi this should be fine.
I don't think this would be fine as a catch-all.
Ranger's evasion buff after using an already absurdly good skill for example probably doesn't need any buffs.

[Poruku]

It would be a pretty big buff, should be case by case