maxademannen

So I was making IlMango's zombie pigman farm on my 1.14.3 server, however, it doesn't work very well. The reason is that the Exp orbs, which are supposed to go through slabs to get to you, merge like crazy, and so fast that the exp doesn't make it out past the slab. According to others, you have to do something in the Spigot.yml file to change this, however it is blocked, I can't access it. Is there a way to access it, or is there another way to fix the orbs merging so much? Thanks