Why is Nami a good support?
Because she is very efishent and scales well, which is perfect for fin-ishing the game
You may be asking... "water you doing with your life?" To that I have no answer, so I will wave goodbye and hopefully sea you again when I come up with a good response.
. W that buffs team mate damage
. E that heals team mates
. R that slows all enemies touched
. Basically all these champions main abilities into one champion.