I dont know if im just retarded or what but i went through the logs and found that this was the only file created at the time of the crash and it said
[12:59:03] [ERROR] Error parsing JSON: Invalid Item: {"name":"extrautils2:EnderShard","meta":0}
[12:59:03] [ERROR] This may result in crashing or other undefined behavior
[12:59:03] [ERROR] Error parsing JSON: Invalid Item: {"name":"extrautils2:EnderLilly","meta":0}
[12:59:03] [ERROR] This may result in crashing or other undefined behavior
have no idea what any of that means but yeah.