Seeing as my practice mode appears to be broken, and spells don't actually cast on others, I'm curious to know about active armour stacking.
For example, does Plague armour and frost armour from the Ice Ogre stack on a single target? Given they are both +8 armour and slows, will one cancel out the other? Or will the armour stack and only one of the slows? Or both slows with diminishing returns?