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.
Taric played early as a pure healer/assist (usually with blitzcrank) and aiming, the more mejai grows, to a magical dmg dealer.
Boots can be changed if there is no stunner/magic dmg dealer against you
You can skip mejai if there is no kills or if you die during ganks
You can take heal lvl 2 and 3 then armor 4 if you take lot of damage early