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The dragon can't hurt you in full diamond armour. It'll be able to hit you but not damage you. The only way to die is either from the endermen or from the dragon pushing you off.
Welcome to FTB.
I'm sure they'll be people out there who are willing to help you. You can also check out so people's lets plays of the mod packs to see what they do and most of the mods are there own individual wiki's which you can have a read too.
Used to play a lot of tycoon games when I was younger. Can't remember which ones I found to be the best but I can remember some of fun that tycoon games provide. :P
There are tools out there that can determine slime chunks if you input your seed. However, I'm not sure if ExtraBiomes affects that or not.
If it does, I guess you'll just have to find a vanilla swamp.
At the top right-hand corner, there should be four links: "Your Username", Inbox, Alerts and Log Out. Simply click on Inbox and you'll be able to real any messages.
I've seen many benchmarks where a i5 3570k/i7 3770k can match and even beat a FX-8350. An i5 3570k is faster clock for clock but obviously a FX-3850 has 8 cores.