Maybe you don't understand RTS fundamentally but its all about resource management and forcing your opponent to invest his resources in ways that will not benefit him in the long run, its called macromanagement. Try play starcraft 2 at a decent level and you will understand it.
Oh! You mean, like, using single potent artillery unit against a cluester of at least 4 weapon teams sitting in one place?
Make your mind already, because every following post you make contradicts you even more.
You want to counter multiple weapon teams, but don't want to use a unit that hardcounters them in best way.
To me and anyone else reading this, you don't seem to unerstant RTS fundamentally and have no slightest idea about resource management ON TOP of having no idea about positioning since you're apparently losing artillery unit that can shoot OVER LOS and SHOT blockers to a direct fire unit of much lower range.