What's it all about?
Normally I use a single length of .2 Kanthal Wire with 4 or 5 turns around my coil, this will usually give me a resistance of 1.6 - 1.8.
By twisting the wire, I not only reduce the resistance of the coil but still maintain the high coverage on the wick, BONUS!
Normally to get a really low resistance coil I would have to reduce the turns to 3 which reduces the amount of wick that is getting vaporised, not so good and this is the great thing about twisted coils.
If you are going to use twisted wires, PLEASE ensure you measure the resistance before putting it on your device, normally you will not have an issue with mechanical mods but VV/VW devices and things like egos have an amp limit on their switches which stops them firing on low resisatnce setups, usually anything lower than 1.2 - 1.5 ohms.
Once again, DO NOT use this method if you do not understand amp limits and the dangers of running very low resistance coils.