NPC Damage-dealt Table-
20-12 - 1d8 (5)
11-10 - 1d6 (4)
09-01 - 1d4 (3)
Quick NPC-Kill Table-
20-12 - Dead
11-10 - Dies after action of next Round
09-01 - Still Alive
DM adds the PC's Fighting Man Level to the d20 roll
After First Hit NPC Reaction Table-
20-12 - Remains on-task
11-10 - Fighting Withdrawl (-1 to hit/+1 to AC)
09-01 - Drops heavy gear and flees
DM adds the NPC's HD to the d20 roll