Personally, I have never defoliated any outdoor plant for over thirtyfive years and I never will.
Your plant knows exactly what it is doing and how to grow her best flowers.
Growing her best flowers does not involve shedding or dropping any healthy, green, energy producing leaves for no reason.
ALL of the plants energy to grow and thrive is made in the leaves.
Quite simply.........
Less leaves = less energy being made = less potential growth.
You could lollipop some branches, but I would strongly suggest to not defoliate at all.
Sunlight spectra that we can not see with the human eye will pass through upper leaves and strike lower sections anyhow.
Flowers do not need direct light to grow, just like how fruit grows all over an entire tree, not just on the sunny side.
Also, moisture does not build up on the leaves outdoors, this is an indoor cultivation problem.