I have the set up wepow in question;
I try with Prya and when you first hit will count 45% attack and 50% attack bcs both apply over 50% hp, but once enemy below 50% no boost and both 3rd and 4th slots are obsolete.
First impression is that it’s a powerful weapon with a strong attack hit , but not really compared with rampage effect. with Prya 1st hit is great but 2nd and 3rd hit may be just a 30% attack from the wepow unless you kill enemy with 2 hits maybe 3rd hit goes to a character with over 50% and boost would apply again.
I didn’t try wepow with other single hit rush character yet , I will try to see if boost rush attack drastically or not.
Originally i was trying for the 20% attack/Ap boost, I think that better suit this wepow since 3rd and 4th slot kind of meh.