For someone like Sion rush attack speed items like Phantom Dancer as he already gets a lot of free AD from his Enrage. But still make sure to take lots of lifesteal and crit, Sion is actually relatively squishy but when he pops his ult and auto attacks hes gaining around 700 hp a second. Wukong is more of an off tank, rushing phage and merc treads on him is always good, then building into warmogs, trinity force, and atmas, topping it off with a bloodthirster is always good too for tons of damage. I don't know much about Garen other than that his effectiveness drops off late game. I hope this helps, I tried to describe the champions you listed since every single tanky AD is different, but anyway goodbye.
Oh yeah if you are ever unsure