Too many presses,

Your encouraging an overuse injury if you did that routine every week.

If you want to do arnold presses (which im not a big fan of) Then Pick one out of the three presses you have listed (pref. seated military or push press)

Do it for 3-5 sets of a mod heavy weight (6-10 reps) Then add 2-3 sets of arnold presses with a mod light weight (8-12 reps) with maybe one drop set at the end of your last set (about 60 % of the last poundage used)

Then feel free to do 3-4 sets or rear delt flys bent over or on an low incline bench, and some side laterals or light upright rows with a semi-wide grip.

once again, not a big fan of ahhhnold presses, I pref reg dumb bell press, as these place the stress of the weight evenly on the deltoid.

NOW, that will be $5.00 Cash, Credit, or $ order, thank you!