I'd give arms their own day. On that day I'd superset curls/pushdowns, closegrip bp/alternate curls, preacher curls with/behind the neck dumbell raises. Of course I work triceps with chest and biceps with delts because I can't seem to give the arms an alternate day, but if I could, then I'd have a seperate day where I'd do nothing but superset. Nothing pumps up your arms like supersets.