I run my Freemax Starre tank with TC coils at 525F and 50W. At 40W it doesn't get hot enough.
I look at high watt ecig mods this way....
Do you drive your car with your accelerator floored all of the time? Every moment of driving at full throttle? Do you ever drive at full throttle?
If not does that mean you would be happier if your car had less horsepower?
I use a similar analogy. A Volkswagen and a Porsche will both get you down the highway at 75 miles per hour. The ride is MUCH more comfortable in a Porsche.
I have 4 mods that get daily duty right now. An Evic VT, an iStick 50, an iStick 60, and an iStick 100. The majority of my vaping is done on my Kayfuns running at 15-16 watts. I have a few sub-ohm tanks that I use for higher VG liquids at higher wattages, but not often, and I have one dripper. To me, it's not about power, it's about battery life. The iStick 60 is the backup.