Fine wiring can be done most anytime, though I prefer to wait until the new foliage is all hardened and old needles are obvious or have nearly all fallen). Heavy/structural wiring is okay to do Aug/Sep.
Do whatever wiring you are going to do BEFORE you repot = just a general 'rule'.
However, if you are going to significantly reduce foliage don't repot, because foliage is what powers root recovery! Choose which is more important to do this year: reduce foliage or repot.