Hey!
Considering that the main function of defoliation before 12/12 switch is to give light to the buds sites forming, that way you'll have more and bigger bud sites. Defoliation 3 weeks after 12/12 switch is to give light to buds and fatten them up. 😃💪
Personally I like to remove 20% of which are usually only the largest leaves that give the most shade, I remove them from top to bottom in that order.
Defoliation is usually just removing fan leaves and not bud sites but I like to remove the bottom first and second, sometimes third as well.
Only when I see that the plant is growing a lot and the light won't penetrate to the bottom, resulting in small, airy buds.
Anything do not hesitate to ask.
Girls are looking great!!
Good luck and Happy Growing! 😃 🌱 🌿 🌲