Try a bunch of different builds with your wire. I would start with.
1. Dual horizontals
2. Dual verticals
3. Single coils
4. 2.5mm ID
5. 3mm ID
Your wraps will be anywhere from 7/6s, 8/7s, maybe as low as 6/5s.
Here is what I am running now in my Velo. It's a 24gTi, 2 core, 36gK1 fused Clapton single coil ohms out at .15. I'm running it on my Snow Wolf 75 in Ti mode at 515F. Killer vape.