Hi everyone, I'm Coven Nami and I've been playing Nami since she was released back in 2012. I've been GM on NA and GM on LAN playing Nami and find her to be one of the most fun and versatile champions in the game. Despite what you may hear from other people Nami has the ability to deal damage, be a heal bot, disengage or engage, and can win lane really hard. Knowing how to use her abilities and manging your cooldowns and spacing in teamfights effectively is the key to playing Nami well.
Nami's W, ebb and flow, scales off her ability power in multiple ways. The heal, damage and bounce all scale differently with AP, but it is important to rememeber that the w Bounce modfies how effective each iteration of the ability is. Every 100 AP is +10% on the bounce, so if you have 300 ap the bounce does 30% more healing or damage than the inital target you cast the W on. This is why I preach that ap is good with Nami, because her W scales so incredebly well with ability power and really allows you to put out healing and damage that is unexpected in teamfights.