Any weapon that gives you boosts from shooting the ground (fireworks launcher, kalleira wand, super shotty, telepuncher, etc.) still boost you when shooting an object without collision, which means you can scale them.
Summary of bug here.
Steps to Reproduce
Place a large wall.
Disable collision.
Fire at the wall with preferred weapon
What I expected to happen
No boosts off of objects without collision.
What happened
Boosts on collisionless objects.