For mission engineer, for first 2 emitters, max range of repulsors, build each launcher per emitter, build blaster or maker per emitter then finish both emitter.
For the last emitter, destroy all ceiling in that room and replace them with launchers.
build and use 8 makers at 4x and wait for a while. then finsih the last.
To all, this game has been already closed because of money problem. Casualcollective is no more except the data for developers and their colleages. I hope that this game will be uploaded on facebook ....