RTSs stand out when they go all in on something. RTTs like CoH are one example. Grand strategy like CK2 is another. Simulated troops like Majesty is another. Basically don't try to mix it up too much unless you really know what you are doing or you are mixing in something completely new. RTS games like WBC3 have average economy and combat but they spin in a shit ton of RPG to make them stand out. Perimeter added unit transformation but was otherwise nothing more than Total Annihilation. Stronghold had a semi okay economy but was mainly notable for its extensive fortress simulation with siege and walls.
Some games stand out with a shit ton of balance and/or polish like Blizzard games, even if their economy is boring.
Basically you need to pick one aspect and do it REALLY well. In a way that hasn't been done. Or you could take one game and make a more polished version, but that's unlikely since you are indieish.