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.
Tristana is a very effective champion and if used correctly can cause hell for the enemy team, because of her rapid attack speed she can take out enemy turrets while teams fights are going on. Tristana can also escape from dangerous positions and battles with rocket jump and this is very useful and can enable great damage without taking any damage. I play tristana as a mid champion and this build works very well for me and is quite easy to play.