How about for the phase tech building theres another upgrade for a building called like.. Phase defence were if the base is under attacked assigned units by the commander like a max of 3 or 5 units auto phase to the Phase defence building. That are like Auto healed and supplyed. >.< tell me if you guys arent following me. (For give the bad spelling if there is any i suck at spelling >.<)

This pretty much exists already - Tasty tasty bacon.