[IE:S] Constant Crash

I have been trying for a few days to fix this crash and have yet to come to a solution. It started when I was making my MultiFarm self sustainable, but there have been constant crashes ever since. It usually listes a few reasons for the error, seemingly at random (TC Node, Barrel, Rendering Entity), I go into MCEdit after each crash and delete the problem blocks. This lets me load the world, but if I break anything, or open a GUI, there's another crash. As a side note, my world in MCEdit has a dozen or so "Future Blocks" scattered around that I did not place, not sure if they are the problem or not. http://pastebin.com/T6jUHtGN Also if someone could ELI5 Tessellators and the "already tesselating" error, I would appreciate it!