I defoliate no later than 2 to 3 weeks after flower starts, then minor leaf removal for dying or over large fan leaves up to harvest.
I also remove little "sucker bud shoots" so that all the plant energy is directed to the larger developing colas.
Never had any issues, and always great harvests...
From week 6 to harvest I use Jacks 321 at 1000 PPM. First 3 weeks of preflower I add some MKP, then back to normal feed routine which is feeding when I water every 3rd day. No issues and hard buds every year.