Getting this right is so critical - knowing where the target is and then having the effectors to engage the target (rough definition of a weapon system).
Having the right sensors in the right place is where drones come in - and then having the right effectors in sufficient (survivable) quantities is critical.
For me that is:
HIMARS in quantity (Brigade divisional unit)
SPG in quantity (fully equipped Regiment - ie. 18-24 guns - at brigade level)
NLOS (battery, brigade)
Loitering munitions (Brigade down)
Land-based ASM (Regiment-sized divisional unit) - though not that convinced about this one
Moving in the right direction but quantity matters.