As naafiri, Your first power spike is at level 3 when you unlock all 3 of your basic abilities. You can start looking to fight at level 3 onwards.

When you unlock your Ultimate, roaming and all-ins will be easier and you’ll be more of a threat.

After you’ve completed your first component item, you’ll be quite strong in 1v1s and have a higher chance of getting kills.
 As naafiri, Your first power peak is at level 3 when you unlock the 3 of your basic capabilities. You can start looking to fight at level 3 from. When you unlock your Ultimate, roaming and all-in will be easier and you will be more of a threat. After you finish your first component, you will be strong enough in 1v1s and have a greater chance of getting killed.