To start off, there is no universally correct clear. You have to adapt to the information the game gives you constantly. I recommend you start at Red Buff every single game, regardless of who you want to strongside. This will provide you with alot more options early game like ganking mid with 4 stacks and invading. Make sure to check your lanes while clearing so you don't miss out on possible ganks or counterganks. The more info you gather, the better.

Full Clear

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Notes
- Doing Gromp before Blue is alot better for Camp sequencing, but takes a little bit longer.
- It can be useful to not ward Krugs and save it for early vision.
- Leaping repeatedly after using Q on Red extends the duration of the attack speed buff.
- Make sure to use your Q as an auto reset.
- Practice makes perfect.

Invading is a useful way of quickly getting a lead early game, especially in lower elos where people don't expect it. The goal is to kill the enemy Jungler at their Buff, and taking the Buff after, if possible.

To succesfully invade an enemy, you will have to start at your Red Buff and clear your botside for level 3 (Red, Krugs, Raptors). You will need to know where the enemy Jungler started. You do this by either getting a ward on the enemy Junglers Raptors, or looking at which lane leashed. If the enemy Jungler isnt at his Raptors while you are clearing yours, they most likely started at their Blue buff. If they are, then they started at their Red Buff. After acquiring this information, you are free to invade them at the Buff opposite of where they started. So if they started Red - invade their Blue, if they started Blue - invade their Red.