I used to do that same routine Stroke a ways back. Heres the deal bro. It sounds like your looking for maximum growth out of your arms. I wish Pullinbig was on here. I dont even think he worked arms and check out his videos in the training section. Strong big SOB at an old age too. Your arms grow from your compounds, Bench, Deads, BB Rows are nice too. Arm work is over-rated. Also check it. Your gonna hit Chest, Bi's on monday. On Wed. your Bi's might still be a little burnt when your ready to Pull Deads. Personally I like and have noticed more growth threw more recovery time. You stated in your post your using heavier weight. The heavier the weight you start using the more recovery time you want. You should be hitting that bench so fucking hard that your triceps are swoll as hell when you leave. Try some dips too they help grow your Tri's nicely, and harden up the chest at the same time. Your biceps make up such a small portion of your arms. Not to discourage you man I mean shit give it a try if you feel it will work. Change up that Monday with Legs and Chest on tuesday or Wed. than Back friday. Once again more recovery on CNS which will = more strength= more muscle. I do sometimes hit Bi's before Legs but like Milk I cant do shit after Legs, lucky to make it to the car, lol.
