I can personally vouch for a bong being the best way to smoke salvia... Even if you lose some salvinorin in the water and by condensation in the pipe, it hits you HARD. You can't get decent enough sized hits of off a short pipe that you need to get a full breakthrough on salvia, unless you've got some seriously hardcore lungs. You need to get as much smoke in your lungs in as little time as possible. I had a full-on breakthrough of a bowls worth of 10x extract smoked in one lungful. Similar sized hits in a pipe never got me further than seeing bits of my room flying around in my room and thinking I was on a boat.
With the bong, before I had even finished exhaling my rip I was already gone. As I exhaled I could feel some sort of darkness eating me from behind. As soon as that had happened I had no recollection of ever being human, I had no idea what I was "before" except that a bit of my consciousness knew I there was "something else", and that I hadn't always been a woman's purse. But these odd, cartoon-like string creatures kept telling me to relax and that I was one of them now. They kept moving in strange patterns from left to right with their one big eye and one small eye, until one of them turned into my notebook. This made me think "Hmm, that looks familiar, but how? Oh yeah! My notebook! Right, I've smoked salvia" and then from the notebook the rest of my room gradually reappeared. For a few minutes I still wasn't sure I was actually safe and was worried I might go back to being a bit of a purse.
Never K-holed, but I have M-Holed (MXE) and that was definitely a MUCH more pleasant experience than being completely gone on salvia...