My Kanger mini used to have those issues when I started with the 1.2 and 1.5 coils, putting too much power to them, burning some combination of the cotton and the juice. That was solved by switching to the 0.5 vertical coils when they became available.
In addition to the Kanger, I have an Arctic, Crown, Atlantis V2, and Herakles. Atlantis has most reliable coils, no leaking, high quality, flavor a little soft. Herakles a good bit better on the flavor and slightly better on the clouds, not quite as bullet proof but pretty good coils and overall quality. With the Herakles, the 0.6 and 0.2 vape very differently- it's like having 2 different tanks. No luck with Crown and Arctic for coil longevity. Neither gets much use anymore.
My wish list includes the TFV4 and/or Herakles Plus, but not as all day vapes...... I still use the Kanger for work, driving, and other places where I don't want to make a spectacle of myself. Tried a TFV4 in a B&M, with the quad coil. Effortless clouds, can't see 10 feet in front of you clouds, even at 80w. Someone might call 911 if I used it in a car clouds..... or I'd get pulled over and interrogated by the local authorities clouds. I want it, but not as my only tank. I'd spend as much on juice as I used to spend on analogs.