I don't think that the placement of the nozzle/s on a small shot like you are talking about would make much difference. The removal of heat is going to be much the same if the spray is put in before the or after the blower.
A single nozzle shot before the blower would be the easiest and least complicated.
Going through a screw blower is going to distribute and emulsify everything very well. With that small a shot you are going to play heck getting the jetting to work at the HP levels you are talking about with a bunch of very small jetted nozzles.
The plate system you showed in the picture is made for a roots blower (671-1471) style. That is not a screw, but a lobe blower.
The jets in that type of system need to be progressivley staged (smaller to larger, front to back) to work properly.
There is an acronym that I try to go by in racing and life, KISS, keep it simple stupid. Things that are not there, never break or fail. 1 or 2 nozzles is much easier and less expensive to work with and will do what you need it to do.
As has been mentioned earlier in this thread you can talk to Justin as he has a lot of experiance with NOS.