I think the problem here is defining what can realistically be achieved - as the ambition of expelling Russia forcibly from Ukraine (by action on the battlefield) simply isn't going to happen, unfortunately. Russia has too much resource and more importantly, too much support - from powers who will not allow Russia to suffer a complete defeat and who are quietly enjoying the West's discomfiture. Obviously the (Ukrainian's) battle must continue and be supported but how and to what (achievable) end?