Try removing Fastcraft as that is the mod named in the stack trace. You will possibly experience more lag spikes, but if the crashes go away it and the lag isn't horrible, it would be worth it.
yeah, problem is that's a bit of a red herring tho. Fastcraft and a couple other mods super-class alot of the functions so that the crashlogs will almost always show it as being a culprit, but again, has a tendency to not be the culprit.
Only one of the logs had a reference towards the end of it that showed perfectspawn having an error, but in essence, perfectspawn is only used when u start a world, but again, it does the same as above, it reroutes all worldgen through it. Thus, it'll always end up in a stack trace.
If I had to ditch fastcraft, the pack itself would be completely unplayable for me, and except for a rare exception/confliction with one mod that I can't recall atm (refuge I think had it in there), I've never had to take fastcraft out of a pack.
Wierd thing is I went chunkgenning for over an hour after I got tp'd by the ancient. Eventually I nei'd me a angel ring (temporarilly) so I could find a good spot and I spent a majority of time flying around looking for a spot. It was only after I settled on the spot (in a desert which is what took me so long to find) and then the crashes started after I was building out the base, no machines, just stone bricks, etc....
edit: For some reason I decided to point the instance at java 8 manually in mmc but every other time I've run tolkien I've done it in java 7. Was getting used to doing it cause of matter overdrive now requiring 8. I might try again with java 7 and see if problems go away.
Surprised Edit2: Ok, no clue. Again, past history is fastcraft works flawlessly, w/o any side issues. One mod (again, can't rem) causes a ctd if fastcraft is added, thus unusable.
I tried numerous things and continued to get crashes so for yucks and giggles, removed fastcraft, and not only did crashes go away but worldgen seems to work a lot faster now w/o it. Not a neophyte here, this is definitely extremely odd. Just to test theory, nei'd a sash + mana and was flying around quite quickly, no errors or anything. I find this odd as hell but not looking gift horse in mouth. Will probably add betterfps but fastcraft will probably have to stay out of pack for once. Lastly, what I said above is true. When these mods (gc, fastcraft, and others) superclass whole functions, they will always show up in stack traces, thus they get finger pointed way too often, but you do get exceptions sometimes.
