The vapourizer's are the safest way of smoking (although there is no real safe way)
CBD vaporizes at higher temps than THC. CBN & CBC even higher, so for the optimal anti-inflammatory effects one should definitely vape at a higher temp. If you make butter out of vaped bud, there won't be too much of the active ingredients (and certainly none of some of the important terpenes, such as beta carophyllene) unless you vape at a pretty low temp.