Poachers Knife Tahm is actually really good

Let me tell you a story, boy, about a king. You see, he has a hunger, an insatiable one at that! But this King is not the lord of a land. No, he is the River King, and all that flows is his domain. Should his kingdom flow over the lands of another, his hunger shall consume all that he surveys until only his own kingdom, that of the every-flowing river of time and fate and everything is left.

Tahm can almost instantly kill any jungle mob using smite + devour simultaneously. This lets him run into the enemy jungle and grab large monsters other than blue/red over their walls with tongue/devour. He then spits them into the wall, smites, and runs on about his merry way with 175% move speed, bonus gold, a buff, and major denial of enemy resources. He never kills the small mobs. Once he clears one side of the enemy jungle, he can go to his own side to capture his own camps.

Tongue Lash/Devour combo is extremely strong with poacher's knife. Give it a shot, you'll see.