I have found a level of Xanax, although it is IR, that does not cause me withdrawals. I think if I was to lower it, I would stay on that dosage and only use a tad lower dosage once or twice a week until I could add in more days.

That method would be very slow, but I also think it is the safest one. Also I would allow in times of crisis, a crisis dosage that was higher, since it is your regular dosage your body gets adapted to, not a crisis dosage every 14 days or so.