Mines a little different than this one too but almost the same. Can't remember off the top of my head but I know my 10 in shield is a little different. Same here, no matter the character I'm always on healer harassment and peeling duty. Full DPS (other than offhand) Noticed it helps damage mitigation slightly and stacking aim as well.
This is my setup, made sure it was up to date. My main job is the do what the dps do unless the healers come under heavy fire. In the case of this I change my objective to peeling and focus completely on protecting them.