The answer most people are gonna give you is to not worry about your weight, worry about your strength. But, if you are set on competing at 220 I'm not gonna tell you otherwise. I cut weight like a complete idiot for high school wrestling, so I can definitely tell you how not to do it.
The main thing would be, don't wait until the last minute. Play the water weight game, but don't be so dehydrated you tear something. There's probly a few decent ways to go about it, but I would advise spending the next few months slowly dropping weight and maintaining strength.
You are talking about losing 6% of your bodyweight here, and a good chunk of it can be water. Should be plenty doable. I weigh about 230 right now, and if I didn't eat anything for 24 hours, hit the treadmill for 2 hours, I could weigh in at well under 220 tomorrow. And my lifts would probly suffer for it, although I don't think by too much.