i really don't know how to progress, i cannot even destroy lv20 shadow ops base, my air unit is elite hellstorm and elite banshee, my land tank is elite hellfire, elite hover tank and elite vanquisher, all these can work well 2 years ago, but now everything had changed, the shadow ops base become so hard and vanquisher look like not longer effective, please help me, i only know 3 units that is good in this era which is liberators, howler and cyclone.