Is that the dark knight halberd?
Yes
Fire vs a dragon??
I didnt actually fight the thing, i just nope'd out of there
Shit, same. There are so many enemies in that area, so when I staggered to the top of those steps expecting to see a bonfire and instead saw that beast looking back at me I was just like "Yeahhhh no".
None of the Dragonbros attack you in SOTFS 
well unless you trespass into the optional areas they are guarding and steal their egg, then they all rush you and fuck you up