I'm told that microdosing Adderall isn't a bad idea-- just take between 5 and 20 of the little balls in there. Amphetamine's effects are super non linear, and this cuts the side effects.
I’ve been taking it for the better part of 20 years - dabbling in various dosages of XR and Ritalin in an attempt to nail down an optimal therapeutic dose - and my conclusion has been that (for me) nothing works nearly as well as frequent microdosing of IR.
As an aside: One aspect of Adderall that doesn’t get nearly enough attention outside forums/subreddits is that the generics seem to have wildly different effects/potency depending on the manufacturer. I highly recommend others with ADHD that are prescribed to Adderall IR try to experiment switching around generics if possible.