Following this build may cause the contraction of downs and ebola, continue at your own risk.

You should always pick Garen, no matter what your team composition is since he is so versatile. Garen is the jack of all trades, except he is the best at everything. He provides insane CC with his Q, massive damage with his E and R as well as being the best tank in the game with his W passive. He can easily get pentakills with his powerful q-e-r combo and should be feared when faced against in any division.

Pros :
Strongest Champion in the whole game.
Strongest Combo in the game.
Best Tank in the game.
Provides the most OP CC in the game.
Can easily get pentakills.
He is also a beyblade.

Cons :
High skill cap.
High difficulty.
Requires good mechanics.
Costs a lot of IP.

Spam Q-W-R until you get pentakills. Also spam laugh and dance on top of all enemy champions you kill.

To sum things up, Garen is the best champion in the game and you should be able to get pentakills every game. After following this build, you will get to challenger by only maining Garen in less than 1 week (Satisfaction Garenteed).

If you actually followed this guide, you may already have downs and ebola and may need serious medication immediately.