100% weakness to fire screw that $#@!! Just my luck to walk into a cave full of pyromancers lol.
Ugh that was one of the worst glitches in the game. If not for console commands it would have killed my playthrough. He wouldn't open the door either, just a massive headache all round. The solitude battle bug is even worse
Ugh, I can't stand that part, I usually just phase threw the door, then keep bugging him and $#@! till he opens it to continue the game. lol
Be polite, be professional, but have a plan to kill everybody you meet.