User blog comment:ClariS/Kayle's Primary Role/@comment-4849897-20120310173712/@comment-4636093-20120310201540

Playing anyone support is about the mindset. You can indeed play almost anyone as one if you have the mindset (almost anyone, as in anyone with some form of CC or ally castable spell).

The mindset is, what would you rather do, shoot your ult at that low health enemy and kill them, or shoot at the person chasing a low health ally and stall them enough to save the ally?