I haven't tried any patches. I have reviewed my battery usage and surprisingly, "Cell standby" and "Phone Idle" use 50-65% of the battery which I can't understand. I do plan to troubleshoot by calling T-mobile sometime. In general, I am skittish about flashing or any third party fixes.
Try JuiceDefender. You should be getting 1-2% discharge for every 8 hours on standby and 4-8% without. All syncing off.