that's the issue there is no least resistant path, both wires are 14awg. Also, if they are twisted together on both ends it will flow down both wires with the same voltage .
It would be like tying one end together and putting it into a light socket the holding onto the other ends of the two wires in each hand. you will get a shock one both hands, not just one.
The only way your going to make it less resistant, with that wire would be to strip it , braid the whole run together into one making it bigger. That cannot be done though. Or run higher quality wire, like gold , that will get you less resistance lol.
But, I am pretty sure twisting the two ends together and running current down using both like that is no benefit at all, unless your plan is to use it as a bi-amp or Bi-wire situation.
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