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EnderIO isn't in 1.11.2 yet. So Buildcraft and EnderIO aren't an option without being in 1.7.
Thermal Expansion and its dependants/dependencies.
AE2 or RS but I prefer AE2.
Mekanism
IndustrialCraft obviously
Magic mods? Maybe Botania or Blood Magic.
The interfaces push if the detected inventory has a slot open meaning that if the machine has 1 open slot. They push their items out. I think. I personally just use an interface pushing into a chest with ExU rationing pipes putting the items into the smelters. Much better.
Btw. I got back...
Thats problem an EnderIO-AE2 Compatibility issue and has nothing to do with the Blocking feature. The interface could be reading one of the other slots within the Alloy Smelter.
Based on the concept of preventing mob spawns. I would assume they need to be powered. Like the Obelisk from EnderIO that prevents spawns needs power.
Also wrong thread?
True, although if you check the mod list, other than a few mods like Calculator, Horizons is basically Beyond without EnderIO. https://www.feed-the-beast.com/projects/ftb-horizons-iii/files/2494124