The best sling shot

[Captain Smith]

For some reason, I cannot fathom, the Earths of our multiverse need to make a human sling shot to shoot a projectile into space. Superman will pull the bands to launch the projectile. It will be a one ton adamantium slug at the oncoming enemy. What's enemy - Galactus, the Death Star - I dunno.

The question is whom to use as the sling shot:

Luffy
Reed Richards
Plastic Man

Other candidate welcome.

[Beadle]

Is the human being physically part of the slingshot critical? Because otherwise I’d just go with Magneto and kind of fudge the slingshot with a human railgun.

[Powerboy]

For some reason, I cannot fathom, the Earths of our multiverse need to make a human sling shot to shoot a projectile into space. Superman will pull the bands to launch the projectile. It will be a one ton adamantium slug at the oncoming enemy. What's enemy - Galactus, the Death Star - I dunno.

The question is whom to use as the sling shot:

Luffy
Reed Richards
Plastic Man

Other candidate welcome.

Just have Superman be the slingshotter and Captain Marvel (Shazam) be the shot. Deatstar: He'll hit that exhaust port, or the toughest part of the ship. Zero difference.

Galactus? Without P.I.S., the Celestials or the Beyonder better be the shot. As the saying goes: It's not the gun. It's the bullet.

[Captain Smith]

The issue is who would be the better rubber band. Whom they are shooting out isn't really my focus. I postulate you need someone like Kal to pull said rubber band back.