Research
Findings from Jake's own tests in the game: headless battles, logged and counted. Every finding shows how many runs it rests on and which version it was tested on. Open questions are not facts yet.
Combat
Measured
Does body armour protect the head?
Every head hit that was not armour-defeating was resolved against the helm's head value of 21: at 21 for slashing and blunt hits, and at 18 for piercing hits, which reduce protection by a share of it rather than a fixed amount. The body armour added nothing to the head.