No damage in dungeons as an archer?

Hi all, I've taken a pretty long break from skyblock and I'm finally returning. I quit skyblock right after they released the master dungeon floors because I dropped a necrons handle and I didn't have the 35M to buy it so i decided to quit right then and there. I started a new profile, and currently have a full strong armor set + dragon shortbow, but I can barely kill any mobs in the entrance. Am I forgetting something? IDK what to add that would significalty increase damage.

Thanks for any help