Im sorry if I miss understood this, but are you trying to get off opiates all together (and using Sub as a transition)? Or just trying to get on to Suboxone and just staying on it for a while?
Im currently withdrawing (im pretty sure its over now) from heroin and am using Kratom (as a transition) and am tapering that now. Its been 5 days since I quit and ive literally been painless this entire time (i tried CT, but that didnt work). If you're trying to get off opiates, I definitely recommend trying kratom as a "transition" to eventually stop. Id personally take it for only a week or 2, but it will definitely help.
You can also stay on Kratom as a maintenance (if you need something for pain) but, the WD's can be just as bad as regular opiates, depending on how much you take and how long you take it (1-2 weeks wont do this).
If I misunderstood this completely I'm sorry lol