Teleporting skeleton packs are overtuned

I’ve reached the monos and was doing fine, until I’ve encountered a pack of teleporting skeletons. They are too tanky (about 10 time tankier than rare monsters), and teleport around me, can’t kill them with multishot before dying. I can’t progress just because of them. Maybe a skill issue or a build issue, still it’s not normal, that I oneshot normal monsters, and it takes 40 shots to kill one skeleton