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.
well if u wonder why i picked lich bane its because it is pretty good if u got high ap and are like mordekaiser if u buy warmog's u should be able to keep alive and after u done with zhonya's sell dorans shield void staff is for magic penetration u could also buy abyssal scepter that is up to u
about the runes
well its good to have magic penetration and AP but cooldown reduction u can change to whatever u want if u dont want the cooldown reduction
about the masteries
well u can need crit strike and 5% magic dmg u will need if u want some more damage