Cannot load SP world without a crash when Ars Magica is installed. I dont know if this goes with ThaumicExploration or Arsmagica.
TE Worked in my test worlds untill I added AM2, and the only fix was either remove AM2 or TE. They cannot work together without crashing.
I fixed any potion/biome/enchantment ID's so thats not the case.
http://pastebin.com/9J6rPGw0