I like a cool vape. And I get it all day long.
You're talking sub ohm when you should be talking supra ohm.
No way you'll ever get a really cool vape with an RDA. I use 'em when I want a dense shot. With a tank, you need to keep the build resistance between 1 and 1.5 ohms. Run at around 9-11 watts. The vapor will only be cool as long as the tank is cool. As the tank heats up, so will the vapor. To mitigate this, I use heat sinks, and ultimately, switching to another setup while the first one cools down.
I have in front of me a Lemo Drop with a 1.2 ohm build. On a mech at 3.7V, that's around 11 watts or so. The higher the power dissipation (watts), the more quickly your tank will heat up. I can produce huge amounts of cool vapor this way. My DIY is 98VG/1vodka/1 flavoring. The vodka thins the VG to the point that it flows more like a 70/30 vg/pg, except without the harshness. I want cool and smooth, both to the max.
TC does nothing for me, because the lowest settings are still warmer than I usually vape.
Dave...I gave up on 28ga. wire months back because they keep distorting when wicking. Well taking your advice I tried again with determination and Walla....area, resistance and 28ga wins. I now have 10 turns at 3dia. 316SS 1.0 ohm coils in my MTL RBA's and they are doing just fine.
After wicking I just push/pull coil back into shape...easy really, still a newbie.