In my personal experience I wouldn' trim,prune or low stress once your into flowering as youl'l be releasing auxin AKA "stresswhich decreases yield
but if yeild isnt the aim and its more of a space issue or heat ect. ect.
do what you think is right
I also believe in only cutting or trimming very unhealthy growth in flowering as it is negatively affecting growth by expending energy to repair itself instead of making me big sweet nugs but these are just the conclusions ive came to in all the research ive done