Oliver was not a close-combat specialist.
His fighting style involved trading blows with his enemies while protecting vital body parts. He was always willing to endure injuries most would consider serious if he could return the damage.
After all, his ability allowed him to heal from almost any injury. Thus, his fighting style evolved around staying conscious for as long as possible.
If conscious, he could manipulate his blood to control his body, shield himself from additional damage, and protect vulnerable areas like the neck, spine, and head.
For Oliver, maintaining consciousness throughout a battle was the most crucial factor.
However, the same could not be said for everyone else.
Most humans would die from the injuries he sustained. So, his combat style was not something to be emulated.
