I'm hardly one to be giving you advice if you got down to 2mg in December. I'm currently on 5mg and will start a graduated taper to 4.5mg in a few days. I've reduced by .5mg since 10mg, as the rule of thumb is to reduce prednisone by no more than 10% of the dose at a time.

The best teacher of what we should do is our own experience. The pace you've reduced successfully in the past will tell you how to do it this time. My own experience has told me to be extra careful approaching where a flare has occurred in the past and to be prepared to slow the reductions and make them more gradual at that point. Fortunately, this time I cruised past 6.5mg where the previous flare occurred, by using the graduated reduction. My doctor has told me not to hesitate to take an extra week on a particular reduction if I need to. I haven't done that so far, but have it up my sleeve just in case.