Off the top of my head, I would say one of 3 options. A single wire coil, a Clapton coil or a small gauge fused Clapton coil. Stay away from parallel builds for now, as they can be a PITA to install when you're first learning.
The
single wire coil is the best for beginners. It's easy to install, and you can probably coil it yourself with a little practice.
For something with a little more flavor, I would go with a
Clapton coil. Also easy to install, but takes some practice to wrap the outer wire around the inner "core" wire. The "valleys" between the outer wrap create a place for extra juice to flow. Extra juice=extra flavor (and vapor, if you're into that).
The
fused Clapton is my favorite of the three. It's 2 core wires wrapped with a single binding wire. This one gives you the most bang for your buck as far as flavor and vapor go. It's also pretty easy to install. The juice gets trapped in the areas between the two core wires, held in by the binding wire, creating a nice little space for the juice to hang out. It's my "go to" build when I need something quick.
As far as specs are concerned, for a single wire coil, I'd go with 26 gauge kanthal, 6 wraps with a 2.5mm inside diameter. This will put you at around 0.73Ω. For a Clapton, I'd say a 28 gauge nichrome with 36 gauge nichrome Clapton winding, 6 wraps with a 2.0mm I.D. 0.82Ω For the fused Clapton, I'd say 30 gauge kanthal cores, 40 gauge nichrome binding, 5 wraps with a 2.0mm I.D. It'll come in around 0.70Ω
I hope this helps.
CC