What wattage is your Smok? I got the Pico 75W because it was one of the mods sold from
https://humboldtvapetech.com
Some people are even recommending dual battery mods for the bucket, although mine has been fine.
The right image is the bucket which screws into the middle image, which is the donut coil. You put your concentrate into the bucket so it never comes into contact with the coil. So no more changing out coils whenever they get dirty - you just clean the bucket.
You need a high wattage mod because the heat from the donut has to heat to the bucket. Some people are even running their mods way above the recommended wattage and finding the sai cooler to the touch. It seems if you heat the bucket slowly you lose a lot of heat to the rest of the sai compared to blasting it at a high wattage.
I was never a bong user, so you'll have to do some research yourself on dabbing vs bongs.