“Maybe add water supply infrastructure to the refinery attacks. Food transportation and production facilities. Electrical grids and turn out their lights. Anything that makes medicines and medical supplies.”
Except for possibly the electrical grid, doing so would be war crimes I believe.
Ukraine will be doing it and “accidentally hitting the Russian infrastructure. Oops.
Maybe an unlucky agricultural even where their Russian potato and wheat crops are blighted to nothing. Add a food aid to Russia embargo.
Fir extra misery, drones could deliver millions of packets of fentanyl scattered over huge areas to help dull hunger pains.