It's not useless, but to get the most out of the set you definitely need Lion's Claw + Fist of Az'Turrasq for your weapons. They'll basically double your damage output. Each.
I played Uliana's only until I found all the pieces of the build, and it was just fine. You really feel each upgrade because they each had so much damage and/or survival. Lion's Claw, Fist of Az'Turrasq, Focus & Restraint, Binding of the Lost, Gungdo Gear. And your cube passives, The Flow of Eternity and Broken Promises.
If you want to play the build, you're fine starting out with just Uliana's, but you'll need to aim for those pieces for it to work at higher rift/torment levels.