High VG juice, and as much surface area on the coils as possible. Usually, with more surface area, you also need more power, in order to heat up the coil properly. Use http://www.steam-engine.org/coil.asp? as a guideline, or the Wire Wizzard on the same website.I'm looking for a cloud chasing build to put in my Troll I can run it either on my Snow Wolf or on my Hammer of God