There is no magic reset button for the marijuana experience. It will change depending upon tolerance and how much it is used/abused. The only thing that can help is time away so I would recommend taking a break for as long as possible.
You want to use coke to ease a comedown... is it just me or is that some fucked up logic there? The comedown from coke itself is probably far worse than even the worst weed comedown, IMO it definitely wouldn't be a worthy tradeoff.