IMO, with the use of kratom, there is no need for opiates. It will eliminate 99% if not all of the withdrawal. Any other withdrawal symptoms could easily be alleviated with some natural remedies. Also, kratom is better at pain relief than most opiates. when you switch to kratom, use as much as you feel like you need for the first week or two. After a week or two, most people find that they don't need as much kratom. After that, you can taper off kratom fairly easily... or keep using it for all it's positive purposes.
Anybody wanting to get off opiates, the best kratom strains would be good quality PC bali, Red vein Borneo, or maybe some Red vein thai. How much you will need will depend on your current opiate dosage.
this is just from research. I've never had an opiate dependency.