This datapack requires the Skeletons 505 resource pack to use, and gives a slight change to the skeletons and strays you find. The pack changes the bows giving the skeletons and strays unique bows. This will require Optifine to work.
-DISCLAIMER-
Unfortunately the use of this resource pack will cause skeletons and strays to not spawn with enchanted bows. However, this pack is personal preference so it's up to you whether or not to use it.