If you can afford an Up'd HoZ, it would be worth buying over a normal HoZ. If you have an HoZ already on ladder or single player, upgrading it will yield you more damage. With enough attack speed, Drac's + a level 5 or 6 life tap wand would be enough. Just make sure to have some crushing blow and open wounds. There are only a few other shields with better damage than the Up'd HoZ. A Rare Kurast/Zakarum shield with +2 skill, deflecting mod, 65/121 Knight's mod with 2 sockets, JSToD with 65/121 Knight's mod and then a JSToD with +45 resist mod. Well I guess those three last shield could be a ST, SR, Kurast or Zakarum base. Those three shields are way too expensive for a Uber Smiter and really only used during PvP.