Unfortunately, for me, any form of stimulant combined with my addictive and OCD personality just leads to unnecessary re-dosing at dosages that would make your wigs flip back. For some odd reason, my least favorite compound of all (Cocaine), even in it's purest form gives me the worst comedowns. I can do a key bump and feel like I'm going to die, but I end up doing endless amounts until it runs out. Fortunately, I haven't put a drug in my nose for years.
I treated every stimulant the same way. I abused MDMA for 12 years (almost 3 years clean from it) and had days that started with double dosing and then re-dosing for another 2 days exceeding 4-5 grams of mdxx.... Crystal was bad too as I have only ever snorted it and I treated it like coke in regards to thinking you need more and snorted 2 grams if ice in a night.
Nothing ever helped me from a coke comedown because I always got sinus infections when instranasally ingesting drugs which would exacerbate my guilt, shame, and idiocy.
For comedowns, my best method was 6mgs of Clonazepam, a gallon of water with vitamins, calories, shatter hash, and 15ml of naGHB before slumber.
Thank god those days are gone.