....... I WANT SAME HEAT IN A PRODUCT THAT CONTAINS NO FLUFF! ......
Sounds like a reasonable request, and I wish I could point you to something that 'just works', but unfortunately I don't know of anything.
But if you're willing to fitz with your cartos a little, I can tell you that I'm vaping on such a device at the moment. It's a 5v PT with a 2.5 ohm bauway top coil from madvapes, using dekang ry4 at 18mg. I like cool vapor, so I usually hit the button about 2 seconds on a 5 second draw.
Just for you, I just now held the button for 6 seconds on a 6 second draw. WAAAAY to hot for me. Lots of vapor, but it made the little muscles in the back of my throat constrict and hurt just like a dry hit does.
Unfortunately, the top coil design isn't fiddle free. I deal with them by taking out all the top plugs, fill by dripping down the side of the ceramic, putting back the center plug, then the end plug and push end plug and center plug both down against the ceramic, pop on a mouth piece and vape. By leaving out the bottom plug, they will leak if they are laid on their side for a while, but you can still turn them upside down and back up to keep the coil wet for rapid puffs.
Afaik, high heat with no fluff means lr attys with 3.4 to 3.7 volts, or higher ohm attys and top coils used with higher voltage devices.
Vape on!
Edit: I see that you've tried the top coils. I only recommend the steel tube ce2s or perhaps the new ones that have a new plastic. The bauway ce2 clones that I mentioned have clear tubes, but they seem to be a better kind. None of the five that I'm using has cracked or came loose at the bottom.