Does not matter who picks the targets, it still is a strategic weapon being used for tactical gains, and there is no telling if the idiotic UA High Command is even following the advice given.
Artillery shell shortage? The Orcs have millions and millions of them. Hitting one little pile over here or there makes no difference to the war or to the troops sitting under the withering 122mm and 152mm shelling. Knock out the 152mm LR artillery and the SR 122mm is easily taken out.
An interesting note on the attack on Snizhne last night. City is 67km behind front line. HIMAR has a range of 80km, so UA using them within RU artillery range.
Having HIMAR vehicles grouped together seems risky. A strike could take out multiple vehicles at the same time. Seems they should be dispersed. The can still attack the same target from different locations without being in a convoy together.