Depending on the juice, I usually find somewhere between 25 to 30w as the right wattage for me with my cCell 0.5 ohm coils.
What is my problem? My mod gets too hot at my favorite range.
This isn't helping,
Is it your mod or your tank that's getting hot?
If we stay with your first post that it's the tank and this statement that now it's your "mod" is just a mistake, then it really is a case that you'll have to consider looking at other options.
The cCells have limited airflow, are fairly small coil cartridges and are not meant for chain vaping and cloud production as what you're saying that you're doing with them.
My experience with these type of coils/tanks was great for a time, but I did end up moving on as they simply weren't "enough" for me, they would be hot at times, but also after that I was rebuilding them for a while, I figured that I might as well go with RTAs (as more and more decent models were coming out)... and the difference between a cartridge tank and an RTA is huge.
So if you want to stay with cartridges, you might have to consider other models/type, such as the much larger multi-coil type, and also, even a very simple RTA would be something that would be easy to build and give you the experience that you're hoping to get.
If I was to recommend you anything (RTA), at this time, I'd say: The Zeus single coil.
It's a very easy tank to build, it's excellent in quality and you will be much happier than with the cCell tank.
Get with SS316L 26 gauge wire, make coils that are 3mm in diameter, at about 0.5ohm range, decent cotton for the wicking.
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That said, if it is your mod that is getting hot due to heat transfer from the tank, then no question about it, get some heat diffusers to put between the mod and the tank, and other diffusers between the tank and tip.
But again, if you're pushing that tank so hard that it's getting that hot, look for another tank type.
Note that if it's that hot, you're also cooking your liquid which will make it taste different, probably caramelizing it.