Alright, I made a new instance with fresh copies of the mods from my downloads folder, removing lookingglass as it caused mystcraft to crash during profiling. I started a singleplayer world and it crashed, so i updated forge to 10.13.4.1451 and it no longer crashes. Mossy Cobble does not appear in the creative menu and looking up the recipe for a chisel2 varient shows fire in the first slot, however fire does not work in a chisel.
The recipe for Tinker's Construct's ball of moss shoes that it still has a id of -1. Additionally, looking up Moss Stone in Nei, both mossy cobblestone and moss stone bricks show up twice under their normal ids, but cannot be used for anything other than being placed.
Help?
Attempting to join the server now shows the error "Mod rejections [FMLMod:ForgeMicroblock{1.2.0.345}, FMLMod:ForgeMultipart{1.2.0.345}, FMLMod:LookingGlass{0.1.1.00}, FMLMod:McMultipart{1.2.0.345}]", but I'm guessing that means that I have to update the server to the same forge version, right?
[Edit:]It turns out that the problem was simply that the newest version of Chisel 2 is kinda broken. After removing it Mossy Cobblestone returned to normal.
[Edit2:]Wait, the game crashed because of Chicken Chunks and now it's broken again after removing it.