A Confusion of Princes
Khemry has been raised to be one of the millions of princes in the Galaxy. He thinks its about honor and a life of luxury. Yet when he graduates to full prince and receiving his first priest - a chief assassin - another prince attempts to kill him off shooting at him from the corners.
Khemry has to learn quickly how to survive. He's been raised to think he is superior to normal humans, however several of his trials, involve turning off his advanced biomech, psymech, and other cybernetic improvements. He needs to learn some humility as well.
As I started reading this, I thought it sounded familiar. Turns out, I had read it a couple of years ago.