I don't prime them, well, in saying that, I only use the Quad coil but I have never needed to prime it, or any vertical coil for that matter, with the Crown coil being the exception.
Pop in a new coil, fill the tank and let it sit for half hour, around 5 primer pulls, start off at low wattage for the first tank, this is key to avoid dry hits. Start around 40 - 50w.