Almost fainted from dieting
I am 5'7'', 200lb, and 21 male. I started cutting on food 3 days ago with calorie deficit around 1000-1500 cal and had 3 meals a day. I was eating little bit of brown rice and cabbage soup for breakfast and if I was ordering a hamburger, I had one cheeseburger. I continued my daily 3-4 hour exercise routine (1 hr cardio and 2-3 hr martial arts) with this new dieting plan. I had harder time keeping up with my Judo and my usual conditioning routines for first two days, but I was feeling pretty alright. However, I almost fainted during an Aikido class on the third day of dieting (which isn't even too demanding physically).
People think I am around 170-180 lb until they see my hulk legs where I carry around that extra 20-30 lb hidden from people's view. I started dieting because I actually wanted to be around 180 lb bit quicker, so that I can play more appropriate weight class for me in Judo and BJJ. (I was losing weight but around -1lb/month)
Do you guys have any better suggestion for a dieting plan that will make me cut weight in better pace (around -5lb/month), but won't make me faint?