Is better to have a buff tracker instead of multiple shield bars. Srendarr is hands down the best buff tracker in my opinion, you can disable all the non-important buffs and hand-pick the important ones and put them anywhere you want.
In my sorc i track my 3 shields and the major sorcery buff, nothing else. The bufftracking icons are almost in the middle of my screen, so i never loss the track of my shields.