Read through the first few posts and skipped the rest to be honest. Agreed to an extent - either extend the duration of Kakka: Ichi, or give it the casting time of a :Ni spell.

I don't have it yet - but will use it when I get it, however only before a fight because as said in one of the first posts - downtime casting an Ichi spell is less damage dealt - alas less TP gained also.

Increasing the duration to last a solid 3-4 mins to last at least a good chunk of the fight would be ideal so you can cast before engaging. That or give it a :Ni cast time.