We must assume thats what the NLOS-C is being developed for. Whilst the range of the NLOS-C is supposed to be lower than that of some other contemporary systems, it's accuracy and volume of fire are supposed to be on a par with the best arty systems in production.
Additionally, I understand that the sytem's range can be significantly increased simply by utilizing RAP shells.
NLOS-LS is simply a perfect companion to NLOS-C, providing the warfighter with pinpoint accuracy, and long range- and the ability to attack deep into enemy territory, without risk of drawing counter-battery fire.
The NLOS-LS missile system allows for the destruction of hostile artillery before it can be used to destroy somewhat more vulnerable tube, and rocket artillery units.
Once the threat of counter-battery fire is diminished, the slightly shorter range of the NLOS-C becomes less of a tactical deficit- and the advantge of it's extremly high rate of fire begins to pay out major dividends.
Of course, if range, accuracy, and sheer volume of fire are more important than having a lightweight gun battery like NLOS-C in the theater in the shortest amount of time- I can think of no better option than the MLRS family of weapons and launchers. The term, "Steel Rain", and testimony of it's effects from the mouths of the MLRS-strike survivors- speaks volumes.
It's not just terrifying, it's also terrifyingly effective.
That said, I suppose a flight of several dozen UCAVs loaded with GBU-39s might be an even more effective option.