Well, it sounds like Ice to me if it slows, I did already have some Ice subclass Ideas. Warlock would summon a blizzard, Titan would either rise a solid wall or have a durable played armor protect them. For the Hunter, maybe something like a Sniper but Golden Gun already does it well. Maybe if your thinking tech, I had a Titan idea where you set up a turret that floats in the area or upgrades can make it follow you or even pursue enemies. Id really like to see that super become real. Warlock would shoot laser beams. Hunter would dual wield like a boss.