Sort of off topic but zip don't want to litter the main board. How do you tell how much a spell is buffing defence like stoneflesh. I also have Mage Armor perk. I would like to see its stats?!?
You can see any active effects by accessing the "magic" section of the menu, which is on the opposite side to items. Its in its own category called "active effects" near the bottom. In there you can see any effect currently active. Things like stoneflesh also add a glowy effect to your character while they are active, so you can see if they have expired or not.