DD used a routine very similar to what RB advised his DD used, my DD would add some over hand throws and she would finish throw about 5 pitches of each pitch she throw in a game to get the feel of the pitch and if the movement was not there she sometimes worked on a certain pitch a little extra to get the feel of the pitch.
I was coaching I left it up the pitcher to feel she was warmed up enough and confident enough to pitch.
Sounds like everything is being done with a purpose and she truly owns her warmup. As a PC that is all I ask for.