The design of Ubers is so that they aren’t build enablers.
Maybe for Barb old Selig build where Grandpa (life), Doombringer (life), and Shako (life and resource regen) contribute to Selig’s effectiveness. This kinda makes them like a Set.
That said, equipping Shako gives you the ability to use skills without spending any point into them. Effectively makes you able to put points into other skills.