Io, Hard Support (Updated for 6.79)
This build focuses on playing hard support as Io. Grants high healing to both you and your tethered partner for lane sustain. Io's global presence means that you should have assists in nearly every gank, and thus provide invaluable damage, buffing, and healing. Early spirits gives high early burst to help feed your carry in ganks. The single point in overcharge provides a large bonus attack speed, and some damage reduction.