Banner of command
I sugest that instead of targeting a minion to promote it to super minion, will be just upgrading the inhibitor of a lane! like for exemple if you choose an inhibitor and upgrade it with the banner of command it gives it a two waves of super minions! because targeting a tank minion and looking for it and choosing a lane kinda make a support busy! instead.. when he recall he calculate the lane that the team wants to push so he upgrade a split push strategy with upgrading the opposite inhibitor lane.
the idea is to make a game stragically for a support players and make them helpful more .
excuse my english
and lose a tiiiny bit of time to actually empower the minion (which is mitigated with efficient recalls). Seems pretty balanced to me.