Hello priest friends, a guildmate asked me to create an addon to deal with Power Word: Shield and Divine Aegis. I thought it might be a good idea for you to have a look at it in case you find it useful:

wow.curse.com/downloads/wow-addons/details/discshieldshelper.aspx

It show you the realtime value of both shields for your target and for mousehovered friendly player units. You can choose to enable or disable any of theses two.

Leave me any comments on either pages and i'll add features if requested.