Ok so I have a slave with these stats

Strength:69 Intellect: 69 Agility: 69 Stamina: 72 Size: 82 Presence: 58 Chi:69

So he is supposed to be a defensive war glad with axe/mace and a shield. The only problem is what armor should he use? Should all of his armor be heavy armor or should I substitute some for medium/light armor?