The problem: A familiar one: not enough diamonds. MFFS needs tons of those. I know of two mods that provide ways to make diamonds from coal: IC2 and RotaryCraft. IC2's way is fairly complicated but probably not too hard to automate with Applied Energistics autocrafting. However, it is inferior to RotaryCraft's process which gives you one diamond for 16 coal instead of 64. Automating that, however, is a little tricky because of the compactor's slot mechanics, unless you want to go "brute force"...
A fully automated diamond factory
A fully automated diamond factory