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I recently installed java 8 and have not had any issues with it crashing as of yet. Try removing all java versions then reboot. Now install java 8 and reboot again.
Just checked dark oak and I made a crafting table. So the issue is maybe on your end. I am using the same version 1.0.1.
Edit: I am using Java 8 update 25.
If you use the beta launcher you will be able to run the 1.6 packs with java 8. Also don't allocate that amount of ram. You only need 3 to 4gb max as java does not use ram very well. I have mine set at 3gb.
I am sorry you think I am an elitist but you could not have searched all that well. I typed "Thermal Expansion no fluiducts" into google and I got this link here.