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.
Trundle has a lot of potential but i have found out that playing him as a straight tank or damage just doesnt cut it. So getting the attack early on can make you a foe to be reckoned with, and gettin the survivability at the end helps out.
-Ability to cut off small paths or slow for a easy kill
-Can be a tank killer
-Good escaping ability
-Laning might be tough if they are both ranged and harass a lot
-A lot of other stuff i dont feel like typing