I have the Smok Cloud beast TFV 8 and 12. I buy the 0.15 ohm coils for both and use the Fuchai 213w mod. I usually Vape between 55 and 70 Watts depending on the tank. I am a heavy vapor but I’m changing coils every 2-3 days consistantly. I’m thinking it may be my juice since I tend to use the candy flavors but I was thinking I should at least get 1 week out of the coils. Any advice is appreciated.