>>538144512
>Ant man without making them cancer
Make becoming small a defensive skill, like becoming invul and cc immune for a few seconds and becoming big is his ult.
>QS
Speed is more tied to skills. Think Mercury from Smite or BP's Spirit Rend dash attack.
So he could do things like quickly dash and grab a target or punch them.
His passive movespeed would be higher and briefly increase after every skill usage, so if you use a lot of skills at once you get pretty fast, or you can spread the usage out more and be above average movespeed semi constantly. Skills should probably not have long cooldown, so you always have access to something that can give you a sense of speed.