Dude, I'm really trying to help, but if you ignore my questions and just post crash reports I have no idea what is going on. Focus on one modpack at a time, go through methodically with me and we'll get it working.
That latest crash(no idea modpack etc etc etc), I see there's Optifine installed. Start with a CLEAN installation, NO changes, NOTHING added and get it running. Then we'll work up to restoring your instance how it was.