Out of curiosity, why didn't you use Direwolf20 instead as it already had Mystcraft? Is it not as well updated?
A notice for people starting with Mindcrack; some machines are now VERY expensive. A standard macerator for example requires three diamonds among other things. It's also a lot harder to find tin and copper than it was in the other FTB server.
Edit: is it the same rules for this server as for the other? Or more specifically, what are the rules for this server?
Given that RedPower exists, one would think it should be preferred over pipes for example.