For Empire I put on storm skin, storm GR and sniper GR
For rebel I put on trooper skin, trooper GR and and vanguard GR (or bikes, or dewback) whatever I am in the mood for.
Works well so far, it isn't perfect but at level 8 you can boost a turret type, at level 7 i boost my walls. It is basically a way to slow them down, none of the good damage units are going to live long without a screener. Make sure to keep bikes in a buried SC that is shielded. Or jump/jet if you have access to them. If you are going to get filled with jump/jet skin them every time. Then use light infantry and dew for screeners. With barracks under the shields for sure.
Also don't forget to change things up with placement and try new combos. It is a good thing to failboat and fall on your face. Changing things up keeps it interesting and you might even learn something
My favorite thing to do is ditch a long build high cap unit or 2 and throw in some stuff that isn't "best" at the moment and see if I can knock off 4-10 min off my build time and still have a good success rate at 95%+'ing a base. It will get you thinking about deployment and different ways to use the more standard units also. Watch people face roll your base and learn from it.