The only way to lose weight (absent surgery) is to create a caloric deficit, and many people find carb cycling a relatively painless (emphasis on relatively) way to do so. Further, there is an at least theoretical metabolic benefit gained by coupling carb intake and weightlifting. All that said, there’s nothing magical about it–if you continue to take in as many or more calories as you burn, no weight loss will occur regardless of the scheduling of your carb intake.
IMO, it is. (Absent drug use of course.) That said, it’s impossible to get “absolutely shredded” without being absolutely miserable–ie, the depth and extent of the caloric deficit needed to reach that state is extreme, and carries a significant psychological cost. At best, carb cycling may reduce your misery index score from 10/10 to 9/10.
Are you sure? I ask because 5’9" and almost 190# at 10% is a really big and really muscular guy. Is that you, or are you perhaps underestimating your BF%?
With regards to the particulars of a carb-cycling schedule: There is no One Best Way, but I’d be happy to share my thoughts in this regard if you’re interested.