I have a maphisto dripper and a kanger subtank mini. I use both on a kanger kbox 200w. Im my subtank i use the rba and have a 26g parrallel coil at about .5ohms. I have a double parrallel coil build in the maphisto also at .5ohms. I keep seeing all these different coils you can build and im just curious whats better if any and what the differences are