Aegolism line : Temperance, Aegolism, Virtue, Conviction
Courage/Resolution line : Courage, Center, Daring, Bravery, Resolution, Heroism, Fortitude, Faith, Confidence
Symbol Line : Transal, Ryltan, Pinzarn, Naltron, Marzin, Kazad, Balikor
AC Armor line: Holy Armor, Spirit Armor, Guard, Armor of Faith, Shield of Words, Aegis, Ward of Gallentry, Ward of Valiance,
Aegolism line will not stack with the other three lines and iirc it will overwrite all three (if lower level?). It is longer lasting and requires less mana to keep your group covered. It also only uses one buff slot.
The best benefit from the other lines would be:
Resolution line + Symbol + Armor
This is sometimes better than a corresponding Aegolism.
Faith + Kazad + Ward of Gallentry > Virtue for example.
If you have Druid Skin, use:
Druid skin + Symbol + Armor
After Protection of the Cabbage, Druid skin provides mana regen so it may be more desirable for casters to go with that combination. Druid skin will not stack with Aegolism or Resolution line.
Ideally my druid will go with:
Skin like Oak + Symbol of Balikor + Ward of Valiance
My chanter will settle for:
Conviction since she has decent mana buffs.