ok Optical_Ilyushin i watched your game on syrtis
i think you have the idea down of assisting stuff with all your engies to have stuff done really fast, just make sure to also apply that to building stuff first, you crashed mass with two 70% factories when you could have one done and then other about half done instead
units sitting around are essentially wasted mass, dont have your units afk in places when they could be attacking other places, make sure it's worth it though otherwise you could be giving him stuff to reclaim
speaking of wasted mass ,you were overflowing both mass and energy at points, meaning you needed to be building/upgrading stuff, im sure you could have quite a lot of ilshy if you spent your mass properly
also, a bit more radars and scouting would be good, having lots of intel means you dont get surprised much and then you will die on accident less
hope this helps some