Keep in mind i've never used any opiate for more then two or three weeks straight at a time but the worst w/d's that i've experienced are probably a tie between Oxy and Dope. Getting off 2-month straight benzo use sucks really bad too and Dihydocodiene w/d isn't too bad. But going on an oxy or dope binge and then coming off cold turkey is easily the worst feeling i've ever had when it comes to withdrawal. I was just going through it today but luckily I found a suboxone so i'm good now but as soon as it wears off i'm probably going back to using dope to be honest.
Btw, today is turning out to be a good day after all...I just got 60mg of Etizolam in the mail and a sample of A-PVP (whatever the fuck that is?). I just took 2mg of the Etiz along with 1mg of suboxone and i'm starting to feel good. Nothing special but relaxing. I'm thinking this weekend will consist of multiple trips with 25i-nbome and 4-Aco-DMT.