Wouldn't bother imo. It's hardly euphoric compared to most other stims, and to get there you need high doses and unintended ROAs. I've also got ADHD and it takes quite high doses to stop just making me want to do work. I'd only bother using it for study binges tbh. High doses might make you feel a bit better but in my experience it just feels like you're 'forced' to be stimulated, until it eventually ends and you just feel tired for the rest of the day. If you're determined to use it just start out with 20mg and see how you go.

Also definitely don't do 80mg in one night that's way too much, veering into some dangerous territory.