It's a premade coil for a subtank. I can't recall if it was the .1 or .2 ohm coil (doubt it makes a difference). Nothing I built up myself. I vaped for a while at 400 degrees F, the max for the coil is either 473, or 518 degrees F (depends on which one, which I don't remember. It's in the trash now). I never ventured away from kanthal in my own builds (I might, it's just, I have sooooo much kanthal). But I've been using both ss and kanthal coils in the tank with no issue, with the same juice. So I know it's not the juice, or the temp I'm vaping at because I ran the ss coil at the same temp with no issues. The nickel coil was rated for over what I was vaping at, so I shouldn't have been experiencing any vapors from it. Idk, maybe I developed a nickel allergy. How unlikely would that be though? To spontaneously develop an allergy like that, and to react to something that shouldn't be giving off any metal vapors in the first place?
I just, I don't know. I can see the merit of TC. It's a cool function, it just doesn't bode well with the way I vape. I'm a MtL vaper, more interested in flavor and TH than big clouds. I can't feel anything on my throat with TC. Might be different if I built my own. But right now I'm primarily concerned about the strange nickle reaction.