I like that the combination of various mods (particularly IC2, MFR and AE) allows practically any resource gathering, harvesting and manufacturing process to be automatized.
Using MFR's auto-spawner, it is possible to capture an NPC mob offering a particularly convenient trade (like paper->emerald), then clone it indefinitely whenever the trade runs out. However, that still requires manually performing the trade every time. Is there something - like a block deployer, or turtle, or anything - that could interact with the villager and trade automatically?
(Yeah, it's overkill. But abusing automation is half the fun in Technic modpacks. )