is 90 damage base and 270 fire at +5. Then you get 4 damage per humanity, someone said it caps at 10 humanity but I'm not sure about that, I've only gotten up to 9 humanity with it so don't know for sure, but that seems pretty low.
nah they dragon head glitch it. someone who tells you they farmed 99 humanity is speaking straight BS. farming 10 takes long enough. 99 would be the biggest waste of time; espescially since you can lose them all when you die and you can just glitch it. As for the humanity scaling, it scales with each humanity. It looked like it was roughly about 1 or so points though not 4 per humanity...I'll have to check my game when I get back from class.