Obsidian or Needle arrows works decent. Fire Arrows does little dmg, but you could use them. I attempted with regular and some fire arrows, bow broke and had to go repair it, only took near half HP, came back with Needle and obsidian arrows which did more dmg, but was still a slow process. I was using a fully upgraded Fine Bow. I never melee Moder, just run around for 20 or more minutes shooting arrows solo. Fight did seem like it took longer than pre-H&H.