About Poacher's knife, and tanky junglers in general.
So, my experience with this item that in most of the cases it's a high risk/high reward item, and it's fine like that because you can't really build it for everyone, and you can't really build it against everyone.
But.
Against junglers who have slow cleartime and generally slow gameplay (For example: Sejuani, Nautilus, Amumu) this item is just broken. You can basically camp the enemy jungle and steal literally everything, while not making a risk of it since all tanky junglers have poor trading potential. You'll take everything from them, and get more and more stuff as the game goes along. Tanky junglers got a lot of hate from Riot since they were introduced, and nothing has changed since. In the new jungle they have no damage or sustain to rely on, so they are pretty much screwed anyways. I had some pretty good Nautilus games lately, due to the fact that i'm plat V on eune, and speaking honestly, there are not many good junglers that know what they are doing. But in all seriousness, give something to tanky junglers that make them better in some cases than the Lee Sin - Rengar - Kha'zix carrytrio.
"But what about warding?" - you may ask.
Well, in soloqueue, the midlaner doesn't really care about the jungler if he doesn't gank, the botlane has their own places to ward, and if the jungler invests time and gold by warding, he will fall back even more.
"you can catch him and kill him 1v3 or 1v2"
Not really, because the item gives a load of movement speed for an easy escape. If your team doesn't react fast (and it usually doesn't since you can't communicate fast enough) then he's off trying to steal more stuff from you.
Please riot, take action and buff tanky junglers in terms of early game or clear time, or just simply movement speed. Just please, do something.
Thank you for your attention.
Sincerely - A sad jungler