How do you poke as melee supports?
Taric was one of the first people I unlocked, and I really like the look of Leona. But I feel like every time I play Taric, I'd be better off playing Raka, Sona, Nami, etc. just because I get out ranged all the time. I feel like a big part of my job as support is poking at enemy heroes, but I also feel like that's really hard to do on melee characters. Poking was very easy on Soraka, who was the first character I really learned how to play, but I can't poke as Taric at all unless someone makes a mistake, so that I can stun them and the ADC and I can then gank them.
How do I do this? I know Taric was really big in the pro scene, so I know it can be done. I'm just really bad at actually doing it without taking so much damage that the poking was pointless. In particular, any time both the ADC and enemy support are long range, I just end up not doing much until the late game.

