So I've mentioned this to other Rioters, but there needs to be a fourth faction in the Mecha vs Program vs Project AU.
The Liquid Metal faction.
Liquid Metal Zac (Q becomes a barrage of blades or a wall of spikes, ult forms giant anvils and spiked balls, etc)
Liquid Metal Azir (soldiers are less detailed, but connected to his body by a liquid metal link, ult is similarly so, with spawn and despawn animations that show the metal returning to his body)
Liquid Metal Illaoi (tentacles are large, metal, and spiky)
Liquid Metal Twitch (poison effects have more of a 'molten metal' feel to them than his usual poison effects, and his stealth has a "cloudy" effect to make it look like he's flying as a swarm of metal)
Liquid Metal Nami (the buff looks more like molten metal than water, the bouncing heal/damage spell has a nanomachine feel to it, and the ult causes her lower body to disappear to provide the metal for a molten wave)
Cmon Rito, when you gonna listen to me :C