Personally I just built the Stagbreaker and used it around corners. It pushes everything and is aoe so you can just peak the weapon and it'll hurt them. Also, the entrance sometimes has a small platform that skeletons somehow can't get onto it. The weapon is created with core wood, deer trophies and leather scraps. It is pretty cheap to make.

Though before you rush straight into dungeons with this one, make sure to practice because it has a huge wind-up before slamming down and it reduces your movement by 20% when wielding it.