I've been doing somewhere between a 16/8 and an 18/4 intermittent fast with carb cycling and like it so far. It's been about three months with some tweaking along the way (more tweaking to come in the near future as well) but all in all I like it. I thought I would have issues with fasted training, but haven't had issues with that.
I like Paleo as the basis of my diet, but I make minor tweaks/concessions based on my personal athletic goals/needs. For example, my body needs a bit more carbs in the form of liquid carbs during/post workout on a day where I'm doing higher intensity conditioning or strength endurance work (basically anything where my body is operating through glycolysis and depleting glycogen stores), and high glycemic stuff like white rice a bit later to restore glycogen for the following workout. On days like this, getting in lean protein and very little fats seems to be key. I also get in a high quality liquid protein which, for me, is a mix of homemade yogurt whey (made from the biproducts of raw milk yogurt cheese making) and raw pastured eggs, and I mix it with either coconut sap or raw, unprocessed cane sugar juice. On days where I don't need as much glycogen replenishment I eat pretty much strict Paleo on the verge of ketogenic, focused on high quality, fatty meats (emphasis on red meat/saturated fat, or wild caught fish), only from local, pasture raised animals such as grass-fed beef. Other than meats, on these days I eat fibrous vegetables, avocado, coconut products, and eggs.