Like.... hear me out.. This is completely intellectually breaking down Kog. His entire kit screams "build on hit" So attack speed scales his W, its the only way to increase it's dmg and increase the dmg out put during the window of W being activated. Kog also needs to hit hard during this so crit along with IE is a must. As it stands right now, Kog cannot reach 2.5 attack speed, and cannot reach 100%. He can't even reach 70% unless you play silver and go ONLY dmg and insta die in team fights. So you are left with a low dmg 2.1 APS, 50% crit 10% lifesteal kog, with 250 AD, 300 with flask. and absolutely no pen whatsoever except on the target you land Q, but that is extremely situational due to the hecticness of team fights and team mates blocking the Q, as well as the duration not lasting very long at all. Kog doesn't feel good, no matter how you play him, no matter how you build him. You can due decent just because you are a better player than your opponent sure. But if the game passes mid game, Kog immediately starts down a terrible slope until you crash at the end, and that end is usually a defeat screen.