I'm not sure extended time off will help. It is a good practice to alternate hard and light days, and a day off per week is not a bad idea, especially if you are in that six hours per day mode. A good exercise from John Glasel for reducing pressure: Play a long tone, and while doing so reduce pressure; it will start to sound "bad." With this same pressure, do whatever it takes with the chops to make it sound "better" (not perfect or normal). In a short time you should notice some muscles being worked (a big ring or circle around the mouth.) This will allow us to train some muscles that don't normally get worked; after shaping up this way it should require somewhat less pressure to play.