I don't really understand the question. Are you asking if it is hard to be competitive in strongman with such low body fat percentage? Are you asking about my strength or energy level? Or something else altogether?
Overall, strongman competitors, even the HW's, are coming in much leaner and more athletic. This is far more prevalent in MW and LW, where you have to maximize body composition to make yourself the strongest and most athletic you can be.
In about the last 5-10 years, strongman, and all strength athletes are getting away from the "mass moves mass" mantra. I think most guys should be fine in the 10-12% BF range for strongman.
I myself am actually down 13-14 lbs in 5 weeks. I hired a nutritionist and I am going to try to walk in at comp weight instead of trying to water cut. I had enough fat on me to make it happen. I am 233.8 as of this morning (started at 247) and my weight class tops out at 231.4. I have gotten stronger and faster during this cut as well.