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.
If their team is a decent mix of tank, ap, and ad, i use this. i start off light on health and heavy on armor/resist in case someone is building madreds. if they do, ill typically do force of nature and odin instead of banshee and sunfire, to get a little bit of health but get more magic resist to block off the madreds effect. because of my heavy magic resist runes, if their team is primarily AD, i will just skip the banshee/force of nature entirely and stack sunfire capes. for this build, i use ghost and flash.