The most impactful option is just a decision. To allow #Ukraine to use the Western supplied equipment to attack into the territory of Russia. This will help with defense by deterring Russian artillery and S300 strikes on border regions. But most importantly it would allow Ukraine to cross into Russia from the North East and circle Luhansk from the North. Just doing it once and successfully capturing some territory back would force Russia forces to stretch even more and expend resources defense.
bluGill