Quality of Life with Temporary AC

[LoveLess]

There's no current way to stack temporary AC to stack in a malicious way, from anywhere else, and not if it is provided by anything else...

At the moment, some of them remove all other sources of temporary AC. There's no reason they should be removing each other, if someone casts Magic Vestment on 0/- cloth, it shouldn't remove Mage Armor. If someone with Mage Armor casts it on 3/4 leathers, it shouldn't remove Magic Vestment. The same applies for all of the Vagabond perks.

Mage Armor
Shield (with SF/GSF Abjuration)
Vagabond Passive
Magic Vestment

None of this stacks and it will always use the highest source so nothing is changing between these casts. There are times when it removes two versions of the same spell, for when someone lower level might cast it with a significantly shorter duration, but they still don't stack.