What's the incremental temperature increase per each 100ppm of additional CO2
So vague as to be a meaningless question. Do you understand why? You'll need to clarify a lot more to make it meaningful.
Now, since you've jumped in, answer my previous question. How does your theory -- whatever it is -- explain the atmospheric heat imbalance, and the decrease in outgoing longwave radiation?
Also I don't understand why asking you for incremental temperature increase based upon CO2 variances is "meaningless" please explain why
You left out baseline and timeframe. 100 ppm on top of 300 ppm has more effect than 100 on top of 400. And to see the full temp increase from it would take many decades or centuries, until a new equilibrium was reached.
As it stands, there are many articles on climate sensitivity that discuss Climate Senstivity. AR5 indicated a range of 1.5C - 4.5C for a doubling of CO2, but more recent data seems to indicate the lower end of that estimate can be ruled out.