Hate to say it, but cutting is usually not going to be quite as fun in the gym, as when you are bulking up, and loaded with fluid. If the aches are getting worse and you feel that it is begining to limit your ability to train, you might want to make some adjustments. First, I have to wonder if you are using winstrol. Good ol' winny will get your muscle more dry and hard than most compounds out there. It will create some awesome cosmetic changes. Unfortunately, it will also equally dry your joints and connective tissues out. For this reason, I only use winstrol at the end of a cutting cycle and I am careful with the dose. 

I have to wonder what your estrogen levels are. If you are taking a fair amount of adex to dry out, you might want to back that off a little. The only time I would get super aggressive with estrogen reduction, is leading into a contest. Joints may begin to hurt in the last few wks, but it's temporary, only toward the end. For an average guy, that isn't competing, I wouldn't dry yourself out quite as much. 

Creatine may help. It's not much, but it will help you gain a little fluid, which might put some padding back in the muscle, connective tissues, and joints. Also, more sodium in your diet may make a difference. 

Finally, remember that your body is more fragile while dieting down. You are more prone to injury, especially when you are very dry. Be safe. Push yourself, but remember, your goal now should be to maintain muscle and fullness. The lower the cals get, the less of a chance there is that you will gain new muscle. At a certain point, it's about maintaining, so as you get into the lower single digit body fat %, there is no need to try to set a new PR on any of your lifts.