Work as much back and chest as you can. Don't forget that you can't just grow your arms significantly without adding mass to your entire frame (so squat heavy if you can).
As for arms, your routine above looks fine. Don't get distracted with weights, but instead focus on getting a good squeeze on each rep without using momentum.
You might want to try a superset of french presses/db curls at the end if you want to finish with a good pump. Do them back to back with no rest, about 12 reps each.