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 is a good laneing but better Jungleing i've used this build in many 5v5vs
i take rabid bite first helps u kill faster and makes jungeling easy then contaminate i take pillar of filth at lv 4 and keep it at 1 till i have to max it out it;s good at level 1 the only problem is the cooldown
i take all armor pen marks makes when u get out of jungeling into laneing easy to do serious damage to the opponent, For seals i take pure dodge easy to not get damage during jungleing and use full during laneing, glyphs u could go full Magic resist always useful.for quintessences i recomend attack speed good for all kinds of combat
For Items i use boots of speed and 2 health potions and 1 mp to build up to Berserker's greaves because i think starting with dorans's shield is useless because it can't build into anything. Once i get my Zerg greaves i go for a giants belt to build twards my frozen mallet which will give u hp to stay in the game some attack and slows ur target makeing it easier for u to get the kill,if ur doing well getting kills i'd go for the sword of the occult next i'd get a infinity edge for some damage tehn u could build for more health or dps, when going DPS i'd go for a blood thirster next for teh life seal and damage followed by a black cleaver u'l have enormous damage and the cleave will lower their armor makeing it easier for u to take the kill. When doing More health tanky i'd go for a randuins for the armor health and cooldown, This will make u durrable with health and good damage.