Just for fun, here's a Powersword versus an unboosted Dire Avenger using my modified penetration system:

Powersword damage and penetration: 113 / 140

Dire Avenger: 200/100/80

2((1/1+e^-(0.015-(80-140)))-0.5)x0.6
= -0.253

113 x 1-(-0.253...) = 141.605

300 (EHP) / 141.605 = 2.119

3 fast attacks to down.