Talk:Sona/@comment-4832742-20140815103842/@comment-4636093-20140815121413

Because Nami runs oom in 3 spellcasts and Sona doesn't.

Sona has way more damage and poke, her mana costs go away completely after you get chalice, Sona has a spammable AoE shield, Sona's Q gives 110 bonus damage to everyone on your team if they can get an auto attack in so that's up to 550 extra damage in one spellcast (not even including the ratio which goes up to 125%).

Nami has her strengths of course, Nami is better at in combat heals because it heals and damages in one spell, Nami has the bigger teamfight ult and hard CC on a basic ability, and Nami's E is much better than Sona's Q during the laning phase because it will get 3 shots always while Sona's will only get 2.