If you dropped $149.99 / £119.99 on an Xbox One Elite Controller, it's understandable that you'd want to use it just about everwhere - including on your PS4. Plug in one little USB stick and now you can: the most recent firmware update for the CronusMAX Plus controller-swapping dongle adds wired support for the high-end controllers.
You'll need to attach both your Xbox controller and a DualShock 4 controller to a standard USB 2.0 or higher hub, then plug the hub into your updated CronusMAX Plus dongle, then plug that into your PS4 to get the whole kit working. But keep that setup in place and it should work indefinitely, using the powered-down DualShock 4 to spoof Sony's hardware verification measures and your swanky Elite controller to score headshots. You can even load up some pre-made scripts if you want to emulate the DualShock 4's touchpad or Share button.
You will need to maintain a wired connection, unfortunately, and the standard boilerplate about using non-standard hardware potentially being picked up as cheating applies. But until Sony releases its own super-deluxe controller, it's the next best thing.
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