If you want to get the most out of your adderall, I suggest you not use more than you're prescribed until you get your dose adjusted, because tolerance has a fast onset and it's a bitch. You may already know this.
I've noticed that crushing and snorting methylphenidate delivers faster onset and longer duration, with more theraputic effects, for me. YMMV. And since you're dealing with adderall, not ritalin, it may be different. But this is what I've noticed regarding methylphenidate. It also causes tolerance to develop quicker.
What are you looking for in changing your method of administration? Are you looking to get high on the adderall, or just manage adhd? I personally have a hard time getting anything recreational out of my adhd meds w/o either taking twice or move of my prescribed dose orally, but if I snort my rx'd dose, I get a little recreation along with plenty of theraputic effects. But like I said, that MOA also causes tolerance to develop quicker.
As for the kpins I also do not recommend upping the dose of these w/o the rx'd dose also raised, because when you go back to the rx'd dose you may experience rebound anxiety or worst case scenario get addicted...and that's a whole other ball of wax. Alot of benzos are poorly absorbed intranasally, I'm not sure if kpins are one of them, but if their bioavailability is greater intranasally than orally, snorting it may give more effects...but also increase the potential for tolerance and addiction. I don't recommend fucking with teh benzos. Taking a sedative antihistamine such as benadryl or doxylamine succinate along with the kpins may increase the sedative effects and 'ahhhh, relief' factor...the same goes for alcohol, just be careful mixing downers.
Also your kpin dose may be dampening the adderall, thus causing you not to notice what others describe on adderall. That could be fixed by adjusting your dose.