The only streamlining I can see on the right side of your diagram would be to drop the Auroral Battery and other ElectriCraft stuff (which can be laggy, from what I've heard)- just put the multiblock dynamos on all your turbines, use Mekanism energy cubes for storage, and convert back to shaft power from there as needed. Mekanism's Universal Cable should be able to power any of RoC's cross-mod engines, although I don't know if the MJ or UE-based ones require upgrades like the magnetostatics.
As for the left side of the diagram, though, I can see many ways to streamline it. You're using a treefarm, a sugarcane farm, and several different Magic Crops to produce ethanol and jet fuel to power a Microturbine for a single machine. You could drop the treefarm and the Forestry machines in favor of more Magic Crops and a Fractionation Tower to produce jet fuel directly. Or, better yet, run the Isotope Centrifuge off your turbines (or a Mekanism-powered Electric Engine with a few Gearboxes) and throw out the entire top portion of your diagram. You'll still need to kickstart your Centrifuge somehow, and I fully agree that a Microturbine and a couple buckets of jet fuel are a great way to do so. But once you get steam flowing through your turbines, you won't need any more jet fuel.
In the bottom left portion, the only thing I can see would be to drop the Pressurizer and void the low-pressure water (or use HP turbines and simply not collect low-pressure water), which won't help when you want to upgrade to Ammonia. That and replace your Cyclic Assemblers and whatever item-transport mechanism you plan on using with Applied Energistics. A 3x3x3 MAC should be able to do the work of all your Assemblers at once.
Also, how do you plan on getting Uranium and Fluorite?
