Let me introduce you to Tiberian Sun: Tech Level War. It's a mod with a new gameplay tweak, in which you have to build very expensive buildings - the tech centers - in order to level up and have superior buildings and structures and eventually win the battle. However, there are not useless units in the lower tiers.
I sold almost my entire base and searched for a crate that gived me a new construction yard. I had enough money so, I started to build a new base. This time I choose Offensive class, so I can't train grenadiers, but disc throwers.