This is the only place i could add this attack shit.
Ok, I hit hard, and then I hit super hard. Generally just always full backswing power attack or single overhand PA after the first round AC determination.
Normal: 19/14 2d6+18
PA: 19/12 2d6+24
Overhand Vital Strike: 19 4d6+25
Overhand Vital Strike PA: 17 4d6+32
Backswing: 19/14 2d6+18/ 2d6+25
Backswing PA: 19/12 2d6+24/ 2d6+31
My stats didnt add properly i think so just to confirm: