With the Missile Redirect effect you could just place some persistents at offsets around your unit and keep redirecting it until your ready to launch it or do whatever with it.
Might need to change its turn rate/lateral acceleration to make it seem more like a rotation and not a choppy point a to point b thing.
If the missile should persist to rotate around a unit consistently and reliably, I don't know if that is possible via mover; in this case I would just use invisible model attachments and rotator site operations to make the model rotate around the unit visually.
If it has to be a missile, a Guidance mover targeted on the unit with a low Orientation vector and Arrival Test Type set to None might do the trick, but it will probably result in some sort of lurching movement rather than a consistent rotation. However, the Blizzard guys made sheep whirl around a unit like a tornado and claimed to be using the mover system for that, so there might be a better possibility I don't know about.
An Apply Force effect could be used to move a unit around if it has one going towards the caster and a force applied perpendicular to the direction of pull (basic physics). Add a switch effect to increase or decrease the forces depending on proximity and you have it.
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