A few suggestions that require nothing more than a few number changes, cause the current situation is unacceptable:
Reduce Vanquisher Charm's mana cost to 20 or 30, have the cooldown start on cast rather than when you stop using the skill as it messes with rotations
Condense the damage to 4-6 seconds as has been done for multiple classes (@Destiny update) (I/L mage, Mercedes, Corsair, ...)
Remove the cooldown on Kanna's upjump (having it be usable max once per airtime). Every class in the game except Kanna has access to unlimited upjump.
Make Shikigami Doppelganger not activate unless there's a target it can hit to avoid wasting the skill
Give Kanna double domain's final damage instead of boss damage which scales worse the later you get into the game
Allow domain to crit
Make boss last 1 minute instead of 30 seconds as has been done for multiple classes' summons, and using it while it's already summoned should replace it (with renewed duration) rather than unsummon it. Add (down arrow + skill) command for unsummoning.
Build Haku's final damage per party member into the kit instead, permanently buffing Kanna's damage
Reduce Kishin's cd to 5 seconds
Align cooldowns with 3 or 2 minutes
Get rid of Sengoku force RNG (damage heavily reliant on getting ayame)
Listen to Kanna players' feedback
