Nate, since you did not add your weights and rep ranges I will be fairly general. In my opinion you are not working as efficiently as you could be. First, the split you are working on is not very good, even though those are popular. You would do better by going to a full-body or upper/lower (Rippetoe is always good IMO).
Specifically, your arms do not need so much direct work (if any). Focus on the big 3 compound movements (squats, deads and bench) and less on isolations. Make sure to add deads to your routine (I did not see it on your post) as they will improve your whole body, rapidly.
You were not specific either with your diet so please take a hard look at your diet, routine and overall goals and let us know where you want to go and we will help you get there. Good luck.
