Can't most fed AD champs do that?
Yes/no His W is pretty crazy and keeps him in the game. Plus I build him kinda tanky anyways so I didn't have a ***ton of dmg like most did. I have 2 ways I'm trying him out build wise.
Full AD - BT, Boots of Swiftness, IE, PD, TF, Maw of Malmortius (helps his late game Q out a lot too which I find drops off late game if you build him the next set)
Tankish/Sustain - TF, wiggles, boots of swiftness, legion, SV, PD
They both work well, (I prefer option 2 more often just cause glass cannon AD doesn't work well unless you got the right team) 2 will I say also help in general sense keep you in team fights as a beneficial matter. I have yet to try a AP tankish (think amumu kinda). I think it would be fun, but Idk how beneficial it would be. I would also need to build complete different runes to compensate for that AP playing style on him.