Unity CPU Optimization for Multi-platform Game

I'm working on an exciting WW2 IOS Mobile crowd game in Unity and need someone who can increase the number of 3D animated characters from 275 to 500 on the screen. This would have to be done while maintaining 45 FPS. The art style of the game is polygons.

Apply if:
-You have 2 solid examples of past game optimizations you can share in your application
-You are an expert in Unity
-You can work full time on this project during the next 1-3 weeks
-You want to be part of something special