Hi there,
I believe your output power is 31.1dBm, is that correct?
I guess I=4.08mA is the collector quiescent current for stage 1 + 2. From this low value of the current one can say that this would be a class B PA.
You did not specify the PAE, which is the most important spec point of your PA...
The starting point for PA design is usually Load Pull of the final stage. If you use ADS, you will find a good Load Pull project in the example directory.
Mosieur_Oiso