I feel like Banner of Command is Underappreciated
This item that promotes them minions giving some nice stats as well I feel is underused 
I seem to do quite well with this item if I can manage to promote a cannon minion and have it backdoor an area. It seems to work extremely well if we distract the enemy team before they realize that minion has taken 2 towers (and they go down faaaaaaast). Did I also mention that its immune to magic as well? Only a AD person can quickly take one down.
Anyone else think that Banner of Command
is underappreciated for supports?
has a passive that gives all items with actives a 20% cdr
then your core items and you win