Also I’d recommend using smite V along with looting (looting optional) because on a diamond sword it one shots wither skeletons (with smite V) also add wolf armour to your wolfs so they don’t die that quickly
Bro I'm having a problem in my world from the starting I have killed a total if over 200 withers skeletons with looting 3 but I've not got a single skull what should I do?