Just based on a quick look at your pictures, and nothing else, I put you around 18-20% BF, which is at the lower end of where you can be and still drop 2lbs/wk of fat. I'm basing this off of Andy Morgan's/Martin's/other sources. However, you stated that you have not lost strength and feel fine, that alone tells me that your deficit is probably ok.
I'm not making concrete, adamant recommendations here as I feel that would be irresponsible since I don't fully know your circumstances - take these with a grain a salt and just what I'm spitting out based on what I've learned from this thread over the months - granted I don't have time to go back and fact check everything you've done.
As far as diet, yes Andy uses Carb cycling and so do I - a little more calories (via carbs) on training days and a little less calories (minus some carbs) on rest days. This works well with a 3 day/wk training methodology. Overall, it's the weekly deficit that we are concerned with.
Honestly, I'm not well as well versed in refeed days but it's my understanding those are more necessary under very low calorie diets and/or cyclical ketogenic diets (such as Lyle McDonalds rapid fat loss (RFL) diets). I would implement diet breaks though when necessary. So I don't have to type all that out, my thoughts have been influenced and mirror Andy Morgan's at rippedbody.jp.