Give Zeke's herald 5% lifesteal for wearer and 10% aoe. Giving person with it equiped 15% lifesteal.
Main argument for this is the lack of item slots in the game. Buying two lifesteal items mean you have to forego either damage or reliable tankyness. lifesteal is a form of defense that is somewhat risky particularly for melee champs.
perhaps you could buff it by giving it only to melee champs kind of like the buff you have on frozen mallet.
...thoughts?