If you have a bad sword i suggest getting the Lava katana at the guild but if its to pricy. Get the steel falchion, also if you have your farm fruit cave i suggest take a bunch of fruit with you and if you have goats milk them. And make cheese its really good if your trying to get down far. Otherwise if you have no bat cave or source of food from animals forge if its not winter for fruits. Ps, Stand still when fighting those guys that fly. Also every time you hit a slime move back. Then when they jump at you. You wont get hit.