Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Long item build I know. Runes are all ready set fro crit chance, so items start with speed and damage adding crit chance along the way. Ignore the damage on this build because you will crit with EVERY hit by 18. THIS MEANS YOU HIT FOR 712 DAMAGE AT INSANE SPEEDS! Leveling your abilities is really your preference because by 18 the only thing you really need is skyfall. Summoner spells are to enable escapes, something Panth lacks inherently. Play defense early and slaughter them late.
THIS BUILD TAKES PATIENCE AND THE REWARDS ARE RIDICULOUS!