Ursa is one of my favourite heroes and I play him quite regularly using my own set of item builds. I just checked some of the guides on the forums and it wasn't quite nearly the same as my item build. I start off with 2 slippers, wand, tangoes and salves. I then build up to magic wand, quelling blade and PMS and regular boots. My first core item would be vanguard, at which point after completing I would roshan and complete my phase boots. After that, I get my dagger and gank continuously until I am able to farm up a guinsoo to KO an enemy hero with hex, making the team battles a constant 4v5 situation. By then the game should be over. Is my build viable?