https://vsbattles.com/vsbattles/2650932
Composite Human vs Master Chief was a total mismatch with the weapons and conditions they were given.
MC is more durable and has incomparable physical AP (
57000 J vs 7500 J) and more powerful weapons with a higher rate of fire.
Meanwhile, the range of 10 meters (along with equalized speed) means that whoever wins is based on whose weapon can actually beat the other's durability and who can land a shot with their weapon first. Intelligence and experience don't matter as much as pure durability and AP due to the close range.
The AA12 with buckshot barely scratches a 9B character (It's pretty much the same as multiple .22 pellets or .32 ACPs hitting someone at once), with slugs it can take down a bear (but MC is a couple times more durable than that), with FRAG-12 MC still has around
2x more durability than the explosive yield of the round. Grenades are a liability at 10 meters, same with the RPG-7, as the blast radius can easily kill both of them.