Keep coming up with too many ideas xD
Jayce's T - Wired Up / Distortion
Hammer Stance: Jayce swings his hammer around him, dealing 90/140/180/230/270 magic damage (+.6 AP) to all enemies around him, and slowing them for 25/30/35/40/45% for 3 seconds. Deals half damage to enemy minions and monsters.
Cannon Stance: Jayce fires a beam of energy, dealing 65/105/140/195/235 magic damage (+4 AD) and stunning the first target it hits. If the target is a champion, the damage is increased by 50%.
Twisted Fate's T - Raise the Stakes
Twisted Fate tosses out a handful of cards at an enemy, dealing 80/120/180/250/280 magic damage (+.8AP) (+.9 AD modifier) to the target and rooting them for 1.5 seconds.
Riven's T - Path of the Fallen
Passive: Riven excels at solo fighting, gaining 20/25/30/35/40 armor and magic resistance as long as she is isolated from nearby allied champions.
Active: Riven doubles her passive bonus for 10 seconds. This effect lasts even if allies are nearby.