I have to say I disagree that a big guy can only lose 1-2 lbs a week safely - as a big chap myself I know that I need a heck of a lot more calories just to keep going and weight can come off pretty quick when I'm strick, espically at the start of a diet. For example when I was doing weight watchers years ago I ate my points, ate my excersie points (was very hungry) regually lost 3 -4 lbs a week. It's just about the maths of sizing things up, if a small woman with a lean mass of less than 100lbs can lose 2lbs a week I see no reason why a big guy with a lean mass of say 200lbs can't lose 4lbs a week IYSWIM.
Are you prepared to hack, or do you want to be sensible?
Options include intermitant fasting, going VLC (look at atkins induction weeks < 20g carbs per day) or you could even consider the Fat Fast as a short term hack to drop pounds quick. Basically you eat 75% - 90% fat at about 1000 - 1200 calories a day, it's not very very safe, but you could drop a lot over a week of doing this and go back to low carb, then do it again.
Dispite what is said I have always found excersie to be useful too - getting on my bike for a couple of hours hard cycling can burn well over 1000 calories at my size (I'm not sure my current weight but it's prob about 215lbs and I'm aiming for arround 195 - 200)
You are a fighter, so I would guess that you are prepared to work hard and abuse your body somewhat to get fast gains. Just beware of the risks.
Lean Gains is very popular round here as a way to lose fat while building muscle - as I understand it you eat a calorie deficit on rest days, a surplus on lifting days and follow a 16hr fast - 8 hour eating programm. That could work well, either from the start or after you have hacked off a few lbs less sensibly
Of course you could just eat MOAR potatoes
You know all those pictures of Adam and Eve where they have belly button? Think about it..................... take as long as you need........................