Can I stop here? I'm tempted to try and go for another Fleur sword but I've had no luck and I feel like any improvement would be pretty minimal for the investment it would need (both time and exp/tuner wise).

Okay, I've been slaving away trying to get a 4/5 hit on Kelpie or Fleurdelys sword for days now and it's not happening. Should I give up on trying to optimize this further?