Strength
The base strength of a God-Eater is high, his power comes from his natural heritage which was meant to slay Gods. This however was a time when the heavens were ruled by a specific type of Gods which did not view unity and deemed themselves as the only type allowed to live in the heavens and contain resources. After years of years of war, amends were made by both species and now they live in harmony, the term "God-Eater" simply defines their species as the ones who went against the original Gods. Their race is actually a "God" which could define their high strength and raw power.
Dexterity
The repeated wars the male has experienced being a King Slayer has allowed him to hone his skills and reactions. He is able to fight well and pull his defenses easily from close incoming attacks. Frontal attacks would be easily guarded from Simba.
Finesse
Years of training and hard work has caused him to be able to manipulate any standard weapon well, as this, in his training will show a King cannot be dethroned easily. His hand eye coordination has thus been trained to a high level to give him this skill of weapons.
Health
Simba's health does not abide to standard human weaknesses, while he can use oxygen it is not needed, and he has a high resistance to diseases and poisons as well, the resistance of poisons not only stem from his heritage as a God, but using his status as a King he would take low doses of poisons using his body's strength to build resistances, and having himself healed by the top healers. This would be the anti-venom effect that persons would use against snakes and such to build immunities.
Endurance
His endurance was built from training for years upon years in the training grounds and years of War, before climbing to the top.
Intelligence
The male possesses high intellect as he has won many wars and slaughtered many Kings. His ability to form strategies are not to be undermined as he takes all advantage of his opponent's weaknesses and flaws.