Why not build some HP on her? Her abilities scale well enough on their own, and the boost from her Riposte passive is enough to forgo one AD item for a Warmogs. Honestly, Sejuani, Skarner, and a bunch of other dudes aren't that tanky unless you build HP on them, and that doesn't seem to be a problem.
"There's no point having the biggest and most explosive gun operated by someone who can only use a slingshot. That's what the Vita is"
Her problems are numerous than that, it's just very difficult to get going with her against anyone that isn't terrible. Everything she does is easily punished. When you compare her to the likes of Riven for example she comes up laughably short, especially considering they play similar roles in the top lane.