the last month-long GBL bender gave me a full-on psychotic break and about two dozen seizures during WD. i have not touched the drug since even though i enjoy it.
Amphetamine and Temazepam. That kinda covers the whole, broad spectrum of most drug effects anyways.
So tough. Most likely Methadone + Cannabis. Supposing of course the supply of 'done is endless. I'm just too greedy, I need like 5 drugs to be happy: Methadone/any-other-high-potency-opiate/oid, Dexedrine (prefer it to Adderall and it's obviously cleaner than Crystal Meth), Cannabis, Clonazepam/any-quality-benzo-with-a-long-half-life, and finally DMT. I wouldn't use all 5 daily of course, but I could live with just those 5 and be super stoked.
amps/speed/any stim and etizolam. That's all i need to be a productive human being.