I would try what you have before deciding. "Best" coil can be pretty subjective. If you like the one you are using, remove it and put it in a ziplock bag, you can wash it (or not) if you choose, but if it's not burnt it's going to be vapable. Then try the others that came with the kit (sorry, I don't know if they all do, or just some, I don't own that tank) but give them all a whirl, that should at least help in your decision making before you have to order new coils, so you have some idea of the ones you like best. That would be my suggestion, as everyone's desired resistance, wattage level and etc., are somewhat subjective, so you need to know what coils work well for you. You at least definitively know that you like the one you have. You may like some of the others more but the best way to find out is by actually vaping them. Etc.
Best of luck,
Anna