question sabout PHAT program

hello guys i want to start to do this program

but i have two main questions here

1. how bad it is to change the dumbbell presses to bench and military press and should i change rack chins? its looks little weird to do maybe there is better replacement?
2. i saw there is 15-20 reps in the hypertrophy days i read that range of reps is for endurance and not for muscle growing - is phat updated? or there is logic behind it

thank you

submitted by /u/Lihex
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