We honestly don't know what happens when you add the black panther powers to an already peak human. It hasn't been shown yet. He made himself peak human after losing the black panther powers.
In the past with the black panther powers, he has been shown to be one of the fastest heroes in the MU, enhanced strength, super reflexes, and enhanced senses (like Wolverine).
He has also been trained to be a warrior since birth, making him one of the deadliest hand to hand combatants int he MU.
Also, he is one of the 8 smartest men in the world. He uses this intelligence to not only invent gadgets (such a X-gene inhibitor) but also he is a master at planning. He always has a plan for everything, especially in war.
He also in the past had access to the largest supply of Vibranium in the world. The country he is king of is the most technologically advanced country in the world.
aka he is a super ninja who rules his own nation and is a genius. aka BAD ASS