Nami Mid Lane
Nami is in the current free week rotation and i've been playing her mid lane, I reached to lvl3 mastery Nami just by playing her mid and I have a lot of fun playing her. Her poke is insane with her w, she has sustain with her heal, she can help her team all around, and she's just strong and fun in general in my opinion. I'll never ever bring it ranked but trying it in normals, it's really fun and I think you should try it out!
My Favourite combo is slowing them with your E so they can't side step your ult, Ult, Q, W. It's an insta kill if you use it on an adc or squishy mid
I build her based on the match up but I almost always build morrelo's