This is such a broad question. I'm going to do my best to try and help you though.
According to
Steam Engine | free vaping calculators Which you can use as a tool to answer your own question, and also assuming you want to use 28g Kanthal??
A 7/6 wrap on a 2.4mm driver should give you around .3Ω in a dual coil configuration. A 6/5 should be around .24Ω