I really like the 1.6 ohms for sure with my bottom coil tanks! I use between 1.5 ohms to 2.4 ohms normally. I was just wondering for my top coil tanks and for future reference. I love learning new things and having a new project! I just want to rebuild every extra coil that needs it now! Lol I think I am going to try rebuilding one of my top coil tanks tomorrowTry the 1.6 before you go and make it to though you might find that you like it