I haven't built a coil since I picked up my SubTank Mini. I have put all my RDA's on sabbatical. So far I am using the prebuilt coils for their RBA portion of the tank. Once those coils fail, I will build Micro coils again. Being a tinkerer, I have done some interesting builds and I think i am just over it. I think I want to go back to basics again. Simple coils that just does what they are supposed to do, give clean flavor and great vapor.
Back to the simple micro coil again. My last RDA coils were getting lower and lower in ohms and I think I was at the point of pushing my comfort level. I think I got my last build down to .12, fired it once, and felt very weird about having it. So I took the coil out and built a .25 coil instead. Then the next day, I picked up my STM and have been on it for about a month. I like the "higher" ohm builds of .5 on the stock prebuilt coils. And the RBA coil that came with it measured at a .53 which tastes wonderful in that tank. I think I am going to try to build .5 and higher for the time being.