The best thing to do is experiment, use the steam engine calculator, try a few different things, and see what you like. I've got a 26awg, 8-ish wrap, 3.2mm coil on my Lemo that's about 1.3 ohms and I run it at 22.5 watts. With a Kayfun, I usually use a 28awg, 10 wrap, 2.4mm coil around 1.7 ohms. I use that one closer to 14 watts.
But those are my personal preferences, and there are lots of Lemo and Kayfun owners who like totally different coils. A good place to start is with 28 or 30 guage wire, somewhere between 2-3mm, and around 1.5 ohms. Then next time, try a different size wire, a different size coil, or different resistance. Or mount it closer or farther away from the air hole on the deck. See how your new build changes the vape. After you've tried playing around with it like that enough times, you'll get a good idea of what you tend to like in a build and you'll settle into a routine where you build pretty much the same coil every time, because you know how you like it. You'll end up with just the right flavor, temperature, and amount of vapor to fit your own tastes. It's fun figuring it out, too.
ETA: If you're looking for throat hit, I'd start with the coil a little higher off of the deck as opposed to close to it. Not really high, but maybe 3-4mm above the air vent. Higher off the deck tends to increase the throat hit.
