i think your throwing to much. you dont need to pitch everyday, thats like working with wieghts every day, youll never get stronger.
i throw just regular 6 days a week, and long toss every day,
but thats just me,
i would a longer long toss, 150 ft maybe? but take it gradually, dont go out there the next day 150 ft. and always make sure you throw on a line, its fine if you have to bounce it but throwing it on a line will helps you have good extension and follow though on your pitching.
long toss is the best way to strentghen your arm