Classic LSoD issue. Made a custom modpack. Everything was working fine until I added Ender IO. Figured out that Ender IO (modular install) combined with either Mekanism or Thermal Dynamics (any or all of the Thermal mods) causes LSoD.
Using Forge 18.104.22.16839 (latest at the moment) and Optifine. I even delayed Minecraft autosave through Optifine, didn't work. Still LSoD in 1-2 second intervals. I have 4GB allocated to the modpack.
Any idea what's happening? I really like Ender IO and I don't want to remove it from my modpack.