Shnowmon is right 100%. The only reason some supports are considered better than others is because they're usefulness is "Good" in most situations instead of being "Fantastic" in a fewer situations and "Ok" at other times. But someone who plays a character very well can make up for that.

inb4 "Viable" "Synergy" and "Metagame"

Janna is my favorite support!

She is like my girlfriend. We do everything together ^_^

Hope I'm not derailing this, or dwelling in the past too much, but in what ways did Kayle get her wings trimmed?