PSA: I passed over the Wrathful version of the Hornbreaker Prince for a long time. I have even seen in a popular steam guide that he’s useless because he doesn’t scale well, but it isn’t always true.
If you are able to give him trample or multistrike, the fact that he gains armour after every kill (which he should be doing 1-4 times a round) and extra rage every time he gets damaged means it isn’t difficult to make him an unstoppable beast that can (with the right support) take down all of the bosses single-handedly.
Also, I just learnt that the limit for debuffs is 999, in case anyone has yet to encounter the hard limit.