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It's a waste of time and effort.
You spend so much time growing, organizing, maintaining berries and can only get 5 levels per day out of that stupid shit. Meanwhile, you can effortlessly grind the E4 or diners, and make money doing it. If you need to reset EVs, just use reset bags.
I don't know why they put those blends in the game. They're a waste of time and effort.