Taric

Strengths

The cooldown reducing component of Bravado makes Cooldown Reduction items like Frozen Heart, Iceborn Gauntlet, and Spirit Visage exceptionally powerful on Taric.
Using Starlight's Touch at lower charges makes its healing less Mana efficient, but can greatly increase Taric's sustained damage via Bravado.
Rather than saving Cosmic Radiance for the last moment and risking someone dying during the delay, it can be more beneficial to cast it as soon as you know a teamfight is guaranteed to start.

Passive · Bravado — Spellcasts empower Taric's next 2 basic attacks to deal bonus magic damage, reduce his spell cooldowns, and attack in quick succession.
Q · Starlight's Touch — Heals nearby allied champions based on charges stored. Bravado-empowered attacks grant a charge of Starlight's Touch.
W · Bastion — Passively increase the Armor of Taric and any allied champion with Bastion. Actively shields an ally and grants them Bastion for as long as they remain near Taric. Taric's spells also cast off the ally with Bastion.
E · Dazzle — Taric readies a beam of starlight that, after a brief delay, deals magic damage and stuns enemies.
Ultimate · Cosmic Radiance — Pulses cosmic energy onto nearby allied champions after a delay, making them invulnerable for a short duration.

A suggested 5-lane lineup built around Taric, based on hero partnerships and role synergy — not win rate.