Lux support works fine, she has a snare, a slow, shield, good poke.
As long as you start with the Blue Support item, protect your ADC and don't build like a midlaner it's as effective as say Annie/Vel'Koz/Brand supports in higher elo's
As long as you start with the Blue Support item, protect your ADC and don't build like a midlaner it's as effective as say Annie/Vel'Koz/Brand supports in higher elo's