i've put in three sessions so far vaping kanna resin out of an rda.
i'm running a .6Ω wickless bucket coil, 24g kanthal, and i'm pulsing the button at about .25 second intervals for a total of about 5-8 seconds/hit. i first tried it on a regular coil with fc-2000 as wick, but the resin didn't want to stay on the coil; because firstly, it is pretty solid even when warm, and secondly, it expands quite a bit when heated. if, for example, i fill up my bucket coil halfway full, after every couple of hits, i have to pack it back down into the coil, as it expands enough to fill up the coil completely, and make a ~1/16" muffin top overflow. this is a pain in the ass. it goes on until the end of the load, at which point it combusts every time. you can, of course, load more before the point at which it combusts to avoid this.
conclusively, this is an okay way to vape it, in my opinion. in the comfort of my room, i'll keep doing it, because it beats smoking it, but this would be a major pain to do while out and about. convection is certainly the method by which it would be most effectively vaped.
