but you have an amber and a red line on your FLI - surely the start of the amber section would be max continuous and the red line would be max contingency with anything above that being time-limited transients.
On your illustration you seem to have amber from 9.5 to 10 FLI with another red dot (transient) just under 11 FLI. I suspect Tq and Ng are probably close to linear up to the limits whilst maybe T4 varies a bit more with airflow.