There are three other nickel coils that work in the Atlantis.
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From left to right is the Vaporshark Atlantis coil (0.15 ohm), the VapeOnly vAir-T coil (0.25 ohm), the Eleaf EC nickel head for the Melo and iJust2 (0.15 ohm) and the Smokeme BOC nickel coil for the Subverter (0.1 ohm). I was going to write up a thorough comparison review, however I had just gotten the Smokme coils in the mail yesterday and haven't gotten around to using them yet. The other coils I have used.
Vaporshark (cost: about $22 for 5) - I love the Vaporshark Atlantis nickel coils. They last forever for me if you are using a clear (or fairly clear) juice that isn't too sweet. I have been using the coil in an Atlantis 2 on an Evic-VT at 500 degrees F and 45 watts. This coil has been in use for six weeks and I have vaped over 80 ml's of juice on the coil and it still works as flawlessly as the day I first put the coil in there. I am also using the same coil in an Aspire Triton and have been using it heavily for 3 weeks now and have put at least 50 ml's of juice through the tank in the past 3 weeks. I have used juice ranging from 50/50 to max VG and the coil can handle them all without leaking, gurgling, or running into slow wicking issues even when I'm chain vaping.
VapeOnly vAir-T (cost: about $10 for 5) - This coil has an adjustable juice flow. In my experience, especially if you are using non-max VG ratio juices, you have to close off the juice flow to almost fully closed. I think the juice flow adjustment ring is loose enough where the juice can seep through to the wicking cotton even if the juice flow is closed. If the juice flow is opened up too much, the juice will flood the coil and seep down into the tank bottom hardware and will leak out of the AFC all over your mod. On the Atlantis 2, I noticed that the juice will pool up in the bottom hardware and the juice will actually start to burn from the heat of the coil before it starts leaking out. On the Triton, it leaked out of the AFC air holes. The build quality is also not so good. The first 5 pack of coils I went through, one of the coils actually fell apart on me. The bottom pin was basically held in place by the friction of the positive lead of the coil, so it popped off as soon as I barely tugged on the bottom pin. The coils only last me about two weeks or so, and as the coil gets old, the cotton wicking material will actually start to shred and get pulled up through the center of the vertical coil (looking down the center of the coil you will see little bits of cotton coming out of the middle of the coil).
Eleaf EC (cost: under $11 for 5) - Just received these coils a week ago and have been using one ever since. They seem to work pretty good, although I have only been using them for a week so I haven't been able to tell exactly how long one of these coils will last me yet. I have been using a 60VG juice with this coil so I have not been able to judge how well this coil will handle a max VG juice. These juice holes are the same size as the Vaporshark coils, so I would expect the performance to be similar. One thing I have noticed too is that the wick hole is a little lower on the barrel than the Vaporshark coils, so when screwed into the Atlantis 2 bottom hardware, the wick holes are actually inside the bottom hardware (the top half of the holes are not visible just above the bottom hardware like the Vaporshark coils), so basically you can vape the tank dry. I do notice that the coil itself seems to not wick as well when the juice level is near the bottom of the tank as it does if you have a full tank. I have been using this on an Atlantis 2 on a SX Mini and the very first tankful of juice I used, when the juice level dropped to a hair above the tank bottom, I got a "Dry Coil" warning on the SX Mini and intermittently the mod started vibrating in my hand when I tried vaping and it would not fire up to the full 40 joules that I had it set at. When I filled the tank back up with juice, this disappeared and now I have gone through 4 tanks of juice, vaping it all the way to the bottom of the tank and haven't had this happen again. The only thing I can think of that may have happened is that perhaps an air bubble was trapped in the wicking material and that cause a situation where the coil actually ran dry?
Smokme Subverter (cost: under $11 for 5) - As mentioned already, I just received these coils yesterday and haven't gotten to using them yet. Need to wait until one of the coils in my three Atlantis/Triton tanks or the coil in my Freemax Starre Pro needs replacing before I can use this. The juice holes on these coils are HUGE....as big as the juice holes on the Atlantis 2 (0.3 ohm) and Triton (0.4 ohm) coils. The width of the coil is a little wider than the Vaporshark 0.15 ohm coil, but narrower than the Triton 0.4 ohm coil. The Vaporshark coil will fit a 5/32" drill bit so that means it measures out to be around 4 mm. The Subverter coil will fit a 11/64" drill bit, so that means the diameter of the coil is around 4.5 mm. According to Aspire's website, the diameter of the 0.4 ohm coil is 5 mm. My one concern is that with the size of the juice holes, and the diameter of the coil, this could result in some leaking in the coil with lower VG juices, as that seems to be a problem that plagues the Triton coil.