the thing to do is to attack the russian infrastructure; bite by bite, like mice stealing corn. mix concrete slightly wrong; cause food to spoil in warehouses; mis-wire weapons under construction; mis-label parts. spy on officials and release pics of them going to the bathroom or getting out of the shower.
don’t blow things up. screw up the power grid a hundred different little ways. send people with contagious diseases through crowds of russians. ship in chinese medicine.