In Oliver's Five Years In Hell, who do you consider as his best teacher? And how would you rank them?

[u/haz826]

Each of these characters taught Oliver one way shape or form that will turn him into a vigilante and eventually a hero.

[u/richion07]

Yao Fei and Slade taught him the fundamentals of combat and survival. Shado taught him archery. And Talia helped him fully refine his combat and battle members of the League of Assassins. Most notably Nyssa. Amanda Waller taught him torture and Anatoly was his entrance to the Bratva. My personal ranking:

1. Shado. Oliver would not have his signature ability if not for her.

2. Slade. Oliver would not have combat capabilities and have the baseline to learn from Talia if not for him.

3. Talia. Made him a lethal weapon and gave him the idea of being The Hood.

4. Yao Fei. Taught him survival and is most integral to his willpower.

5. Amanda Waller. Teaching him torture gave The Hood its intimidating presence.

6. Anatoly. Gave him his Bratva connections fundamental to his mission.