Checked in with the dev. team in regards to the effects or protect and shell and their duration. While there isn't much detail we can go into for specific spells/abilities, they wanted me to pass along their current vision for how they will address them going forward. The thinking is that if a spell has a "long duration," its effect should be less powerful, and on the flip side, a spell with a "short duration" will have a more ample effect alongside it.