The Vaporshark Atlantis coils are great coils, although they are pretty pricey at about $22 for a pack of 5. Unless you are using a very sweet, coil gunking juice, they will last you forever. I have one in an Atlantis 2 on my Evic-VT and I have been using it for 5 weeks now and I have put through close to 100 ml of juice and it still vapes as good as the first day I put the coil in. With some sweeter, colored juices, they last me about 2 weeks. I've also tried the vAir-T coils, which are manufactured by Eigate (the parent company of Aspire). They're not as good. In a best case scenario, they only last me about 2 weeks, although they are half the price of the Vaporshark coils. The eLeaf nickel coils for the Melo/iJust2 and the Smok Subverter nickel coils are supposed to work in the Atlantis as well, although I haven't tried them yet. I have ordered some, but I'm still waiting to receive them from China.
I also have found that trying to clean the used coils by soaking them in vodka doesn't work very well. The second time using them, the coils seems to last me a little less than half the time the first time around does.