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You never specified an amount of time, only "at once". To me, "at once" is an instant. But yeah, combining 5000,00000000000000005000 U worth of atoms isn't that powerful in itself.
Oh, I know how few it is, but because you can do it at once, it can happen infinite times per second. I reckon that's enough to make a nuclear explosion
Forestry adds the apiology mechanics (beekeeping). Look at custom bees as custom recipes (essentially a modpack thing), where a combination of two bees yield a new bee, which yields a certain comb. You could make a custom bee for your SSP game if you wanted, though most of the beekeeping mods...
It's more a case of: money can't buy you happiness, or in this case: when you're sitting on all your fancy machines, you're still as alone as when you created the world.