my friend actually prefers playing tank soraka than any other build.
he usually buys boots of mobility, and the 5 sunfire capes, this may sound crazy, but with so much health, it takes a while for anyone to kill you, and then you have really good heals to boost you back up.
this is an anti-melee build, as the characters are attacking you, you deal 200dps just from standing there.
first time he told me of this i thought he was crazy, then we played a 5vs5, just to show me the awesomeness of this build and if i remember correctly he had 29/3/?? (assists were high too ), and this against a fairly good team...