I do not recommand her invade junglers like Shaco ect... you'll just lose your time.

Start with bot lane always to get a better pull, take W first to clean faster golems or gromp, dont start Q its sh*t and smite the camp. Then ward around your red or blue buff to be sure you wont be invaded. Up your E in 2nd, condemn is way better than Q to take less damages. If you started with golems the passive will stun, then try to do not condemn during this to maximize stun duration and take less damages. Then, do wolves everytime, way better than Wraiths and site wolves, gj, you are level 3, up your Q. Go to your 2nd buff and clean it easy without pression. If you have enought life, go to Scuttler. Your smite is up, you can clean golems or gromp before recall. You did it. You rule.

I recommand the pink smite to clean without difficulty but you can do all, not a probleme. Take 4 health po and a ward ith the smite
Now, reach faster Devourer as you can and stack it even faster BUT you are with ******s, and they needs help ! So you can eventually gank, even if its not that strong early, the condemn and red buffs will help you to get some kills to earn mon$y.
One shot your Devourer at 2nd back and your the king.
Now your real mission starts, GET ALL THE FCKING SCTUTTLER AND DRAKES ! (try to ks some kills on "ganks" also).
If you stacked Devourer then you won the game.

With the actual Devourer you deal true damages every 2 auto hits, now, all will turn around those true damages !

You must get 2.0 or 2.5 attack speed after full build, thats why i recommand with the Devourer to build Berserker boots, BOTRK and Wit's end then to build tanky.
With this stuff you got 2.5 attack speed, and you'll see the crazy damages, but you still squishy and your alone with ******s ! Thats why you must defend yourself with some defensive items like Randuin, Frozen mallet, Banshee ect. Those items will helps you to survive in a hostile place (like a team fights).
Gj you get a pentakill and won the game ! You are Vayne Jungle Off Tank !