Power Attack Modification

[magic_gathering2001]

Atk: +16/+11/+6/+1(20 to Pwr attack)
Dmg:2d6+1d6+1d6+56
Average per attack:70
Chance of hitting*dmg per hit=dmg per round
.05*70(*4 attacks)=14(AC 37)
.95*70+.7*70+.45*70+.2*70=161(AC -3)

Atk+34/+29/+24/+19 & +34/+29/+24
Dmg=1d6+1d6+1d6+16 & 1d6+1d6+1d6+11
Average Dmg per attack:26.5 & 21.5
.05*26.5*4+.05*21.5*3=8.525(AC 54)
.85*26.5+.6*26.5+.35*26.5+.1*26.5+.85*21.5+.6*21.5+.35*21.5= 91.175(AC 37)