Actually, you could quite comfortably argue that being at 110k (36% behind burglars, assuming 150k) isn't "perfect". Rather, it's far from perfect. I'd be more hesitant to use such a phrase, if I were you.
I'm aware that champions possess a trait called "Masochism", but suggesting that Brutal Strikes has to be nerfed is, frankly, utterly silly. There is absolutely no need for this. Even with what you're suggesting, champions will be miles behind burglars and wardens, while also being miles behind both in terms of survivability. If anything, champions should deal more DPS than burglars, to compensate for the lack of defensives that burglars have (Provoke, KO, TnG).
I don't think ANY class should be as strong as Burglars are right now (even on Beta)
Considering that Burglars and Champions gain more support in groups both obviously should be lower than Wardens at the dummy (so the endresult with support is the same). So when a Warden does ~135-140k the target for Champion and Burglar should be 110-125k solo because raid support will close the rest of that gap. As you can see Burglar is still way overtuned