Sounds like you're doing everything right. If you decide to play with TC more, while there is the safety issue of not getting the coil too hot to increase the production of nasty crap, it also makes for a very smooth vape. Of course that depends how you vape. I like a longer draw, so with TC it's not going to be too hot at the end of a 6 or 7 second draw. But that's as not a common draw for mtl, so from that perspective it's less useful for the experience. But if you like long pulls that get a little too toasty after several seconds, TC will handle that. It also protects you from a dry wick and a dry hit, not to be underestimated.
It nice you have all 3 to try out to see what you like. Be aware that after your experimental phase, you can dry burn the coils when you change your wicks (go a little light on that with the SS just short pulses and glowing a low orange, white hit isn't good for the metal). You can get a coil to last you several months before you need to change it because it just won't clean up, you bent it too much wicking it, or you're just plain bored and want something to do. That much wire will last you many years unless you start the down the dozen RTAs running and spinning fancy wire path, in which case you're still set for a few years, although you might want some other gauge wire (if you spin you need really thin 32-36G for the wrap). But for a mtl tank like that or others complex coils are just not a good match and you're best off doing what you currently are. Have fun with it!
