One obvious thing was left out of the formula: Hitpoints. Bodyguard units and elephants have more than one hitpoint. This should double the score for bodyguards, for instance.

======

Phog:

You asked what the best cavalry was for sustained melee. One good indicator is: What units can survive it?

Here's the cavalry ranked by best overall defense stats, best to worse and excluding bodyguard units. Note the high rank of the Norse War Clerics.


Tsars_Guard
Norse War Clerics
Quapukulu
Royal_Mamluks
Conquistadores
Norman_Knights
Polish_Knights
Chivalric_Knights
Polish_Guard
Crusader_Knights
Noble_Knights
Christian_Guard
Teutonic_Knights
Knights_Hospitaller
Knights_of_Santiago
Knights_Templar
E_Chivalric_Knights
Serbian_Knights
Royal_Banderium
Huscarls
Lancers
Imperial_Knights
Kataphractoi
English_Knights
Portuguese_Knights
Feudal_Knights
Mercenary_Frankish_Knights
Armenian_Cavalry
Mercenary_German_Knights
Hussars
Serbian_Hussars
Gothic_Knights
Mamluks
Druzhina
Sipahi_Lancers
Latinkon
Gendarmes
Italian_Cavalry_Militia
Mercenary_Knights
Italian_MAA
Condottieri
Famiglia_Ducale
Polish_Retainers
Mailed_Knights
Granadine_Lancers
Merchant_Cavalry_Militia
Broken_Lances
Kwarizmian_Cavalry
Alan_Light_Cavalry
Byzantine_Lancers
Mounted_Sergeants
Arab_Cavalry
Elephants
Demi_Lancers
EE_Cavalry_Militia
Scouts
Albanian_Cavalry
Stradiots
Tuareg_Camel_Spearmen
Greek_Militia_Cavalry
Bedouin_Cavalry
Border_Horse
Hobilars