#2 can be achieved with WI regardless. #1 is still dependant on the compressor flowing greater mass when water is introduced. I find this all very interesting, and may revise my plans for adding a second water jet pre-intercooler to adding it pre-compressor. I did find a good article based on your search terms that was very helpful -
http://www.caldwellenergy.com/pdfs/WETCOM.PDF particularly "With compressor inter-cooling, the compressor discharge temperature is reduced considerably allowing more fuel to be burnt in the combustor. A secondary increase in power output is due to increase in mass flow rate." . It all sounds too good to be true but highly attractive if it works.
My second concern is how to calculate water usage for a given jet size given an assumption there will be a variable vacuum present at the compressor inlet. I suppose I could relocate my boost/vac gauge there for testing.