[Superman]

A good crimp connection is best. Believe it or not. Even with a solder connection, there is supposed to be a crimp or physical attachment. The solder is to add stability to an already-physical attachment. When we make amplifiers, we use terminal strips to make connections. The wire is wrapped around a terminal first, making a physical connection, and solder is added to hold that existing physical connection in place. A 'military grade' version of this is where you wrap the wire around the terminal not once, but twice. In connecting two wires without anchoring them to a stationary terminal, I would make a physical connection. Preferably a crimp connection.

This is how we build things like cars and houses and electrical distribution systems. Physical connection is best.