Better to focus on targeted attacks. I think the Ukrainians know there country so guerrilla warfare is a better idea. Keep the Russians miserable and fearful of surprise attack. Ukraine can’t beat Russia but they can break the spirit of the Russians so that they end up going home after years of embarrassment.

I think it isn’t all that different then Vietnam or the US revolutionary war. Both victories were people who were protecting there homes. They used local knowledge and clever tactics. If the Ukrainians can keep the sky clear and stay hidden they are good.