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As someone who is on the "high functioning" side of the spectrum, there's just some shit you can't replicate and the deeper into you go, the more it's going to appear to be lobotomy.
That said, I'd say a combination of Adderall and weed will get you mostly there. A regular dose of addy will be fine, but for the weed, you need to take enough to where you feel kinda bad, but can still function.
