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.
Start with your Bot lane ALWAYS. When you start with Gromp do Blue and after this Wolfes. Go to the Scuttle Crab and kill it (this will give you an sweet amount of hp). Do Red and than Raptors. Do wolfes and than go back.
When you start with Krugs than do the same thing just the other way around.
How to One-Shot
Get your 5 stacks of ferocity. Press R. When you find an enemy you want to kill activate Youmuu's. Press your 5 ferocity Q befor you jump. Activate your W,E an Hydra in the air. When you do that successfully you can One-Shot.