I'm not familiar with the v6, but my old vamo can only go as low as 1.2ohm. If yours is the same, you're going to either need a lot of wire, or thinner wire for dual coils. I would really suggest starting with a single coil, make that as good as you can, then move to dual coils if you feel you need to.
If you really want to do dual coils, you'll need two 2.4ohm coils minimum.