yeah they should be beaten by passing charisma checks instead
- Discover Moghwyn Palace.
- Fight Mohg.
- Get killed.
- Go to the Haligtree.
- Meet Malenia.
- Instead of a bossfight, have the option to tell her, "Hey, I know where your brother is, but some jealous guy stands in the way."
- Malenia disappears without a word; no fight.
- Return to Mohg, and see a golden sign on the floor.
- Summon Malenia to puree Mohg's bloody ass.
I honestly would have loved that.
Anything that goes on "on paper" means nothing once you start talking about Rivers of Blood. The scaling, total attack power, and bleed buildup are all irrelevant. Just press L2 three times and you'll see why. The weapon art is so unbelievably broken that it's impossible to use it without feeling like you're cheating.
Which is funny since it was nigh-unusable when the game first came out. I found Rivers Of Blood, and thought it looked kinda neat, so I dumped a lot of stones into upgrading it... and it was utter shit because the arcane scaling was bugged.
So it went from one of the most useless weapons, to arguably the best.