a prince of rage would be able to destroy rage, but also destroy through rage, yes? does that imply some kind of awesome calming down skills in order to destroy rage, but also be prone to anger and violence and destruction?

Not necessarily both at the same time. It’s likely they could do something like that- For example, look at Kurloz. He’s super calm all the time, people around him kind of trust him because he’s just the creepy mime that sometimes gives you the middle finger but like, he’s not a threat or anything. And then all of sudden he’s corrupting and mind-controlling poor Meulin through Chucklevoodoos and his Cult, which is heavily Rage-coded. He kind of has both the pacifying and the more aggressive sort of mind control “LONG LIVE LORD ENGLISH MY KITTY BITCH” kind of states, giving a look at how embodying both sides of this spectrum can work. But a Prince of Rage wouldn’t need to do both of these things necessarily, depending on who the Prince is they may lean to one or the other. Classpects basically tell you the possibilities, the spectrum in which one’s powers and general personality traits may fall on, but the specifics and how far they take it is always dependant on each unique case.