So, I wanted to try out the synergy with bonus damage from her UR Prunus Leg (Mileage Weapon) and her Stun/Groggy skills. I swapped in UR Kugasa Hikage for the extra weapon skill damage and particle charge to get more access to the weapon skill, but the weapon skill dosent hit in a massive area like I was hoping. It just attacks directly in front of you with a small frontal AoE. If you line things up right you can still hit multiple targets, but you need to be on point with it. Most of her stun/groggy skills are like that.
Since I have a maxed-out UR Round 0, this technically a DPS loss while using normal attacks, but a noticeable gain if you can exploit the Stun/Groggy bonus. I feel like this build would be really pretty good in Arena Tower and maybe VR. These Mileagae weapons are more PvP focus, but i was just trying to find a use for them outside of PvP since it's a waste of time outside of weekly gems for Top Class.
I do like the Ur Prunus Leg though. The active is really cheap and you can use it very frequently with the right setup, so you can constantly groggy everything. Pretty fun weapons, but I with area effect was larger to make it easier to use in PvE. One more UR Demonite and i can max it out! :D