Maybe I can help Ding, some things just don't need to be too technical and TC is one of them.
The joules on TC mods are just YiHi marketing schtuff... The first thing is everything that you know about Kanthal is really not required for TC purposes.
The Joules are basically Watts for our needs with these basic TC mods.
You really only need to worry about two things, that you coil is built to TC spec, Ni 0.1Ω-0.4Ω or Ti 0.1Ω-0.8Ω on the Cloupor Mini Plus. The second one is the temperature that you want your vape to be.
The Joules or Watts is the amount of power that gets the coil up to the set temperature. Some TC devices you can set some you cant, the iStick 40W TC puts 40W out to the TC coil to get it up to temp and it is not adjustable. Your Cloupor has an automatic setting, my iPV D2 I can set up to 50J (YiHi). If I set my power to 7J and my temp to 450F then it will take a 26g build of Ti quite a while to get up to temp, if I set it to 50J it will get there immediately. You shouldn't have to worry about any of that as I imagine the automatic power setting on you device measures the time it takes to ramp up to temp and adjusts accordingly.
This is what I want from TC. A consistent vape where every hit is the same. Also when my tank is dry or I have juice flow issues I don't get a dry hit. The iPV D2 does both of those things perfectly.
I think that your 330-350F might be a little low, I run my coils around 430-460F but you will know if your vape is warm enough or not.
On a Kanthal build a 0.1Ω coil on a fresh battery draws 42A bringing it temp so you can vape. The 0.1 Ni/Ti coil is brought up to temp in miliseconds from the TC circuitry and doesn't require the same hard amps to achieve this.
If this is not what you are looking for then I'll just fade back into the background again...
I imagine Boden will correct any errors in my logic as well.