No matter how they look at it, a power output of 220 is very far from that of 1,000. That is a difference of 5 times.
This difference only increases when Arthur's theoretical power output is compared to the strongest beast corpse, which had a power output of 3,000. It increases from 5 to 15.
Normally, every corpse will earn a base value of 10 kill points for each value of the E unit of measurement that they earn. In this case, the corpses with a power output of 10E will earn a base value of 100 killing points, while the corpses with the power output of 30E will earn a base value of 300 killing points.
This base value is then affected by the other three factors. Arthur's cultivation, being the second most important factor, is accounted for first.
After Arthur's cultivation has been determined, the number of years he has spent in the sect is used to increase his theoretical power output.