eseven_

magmatic is definitely not the way to go for this very reason. I highly suggest going down the sewage/sugar route with reactant dynamos. Cheap to set up, entirely renewable, and nearly no energy dost to produce the fuel. A possible expansion on this design is creating a blaze farm to replace the sugar with blaze powder, which is possible using MFR's autospawner.

If magmatic really is your thing, I believe that it is cheaper to use an MFR lava fabricator than a crucible on cobble. I may be wrong, but I think MFR (at least as far as wiki sources go) takes 100000RF per bucket, whereas melting down cobble is 240000. Does anyone have in game values for this?

actually, AOTB has a LOT of 'unique crafting tables' which do not conform to NEI and will not bring up recipes, stuff like the genetics lab, dino tables, and the like could use a comprehensive wiki
 
not to mention it would be a good place to put tutorials, introductions to poorly-documented mods, (of which there are several... or if not poor mod documentation, then scope that vastly outperforms existing documentation) tips and tricks that are absolutely and uniquely suited to aotb (does anything else need a bat-spawner? or a custom MFR breed-sorting Darwin farm?) and workarounds for commonly-modpacked mods that may not be available in the pack. good explanations of how certain blocks interact with modpack-unique items can help as well (Carpenter's fences used around an MFR farm will kill baby animals)