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I got a 6 IV ditto off of GTS.
I will also collect boxes upon boxes of eggs, which is incredibly quick due to turning off the option to choose to put eggs into my team (they automatically get sent to the box). Then once I collect 5-7 boxes of eggs I will look at the box in PKHEX and see which egg is shiny and which eggs have good IVs; keeping them and then deleting the rest.
I'm not big on the stat hacking, but using the pkhex to visually see if my eggs are worth keeping is perfectly fine to me.