This build is the most effective build i have seen so far. I went 17-2, 15-1, 18-4 in a few games with this build that i have designed. i have smite, because when you are pushing/running when you use smite you gain hp from a minion for killing it, with trundles passive. all the runes i have are primary, and are most effect, because they are exactly what trundle needs. In 3v3 I like to get a head start and go for bottom bush, then hopefully one of my team-mates has a stun, then i pop ghost and rip one of there weaker champions. then as a team we go for the rest. then between soloing the top you always wanna go and jungle the top section, for the extra experience between minion waves to stay on top of the game, and always look for the ganks cause i find when my team-mate dint call Mia's i get ganked while jungling, but ether way trundle is excellent at escaping sticky moments.
Please look at this build and try it and leave comments.