have not done extensive tests myself but seems using a spell naked and using a spell with full heavy armor dont change anything, or that I am able to notice (no logs).
and the enchants that come base line with the robes are learnable so I can just put them in heavy armor? I do notice them being weaker (on armor than the ones I have on cloth)... but that may simply be due tomy enchanting skill being at difrent levels?
I have a hard time believing I can be a full armor mage with no downsides but a litle less speed and more stamina sprint consumption.
also couple other stuff I been wondering (and lazy to test cuz there are only 24 hours in a day and am currently testing my nord shield and sworder:
-does spell skill decrease mana cost like it used to, or something else or nothing at all?
-are paper/linen usable in later stages of the game (for enchanting)?
-what does M'aiq the liar want this time lol
do share any joocy stuff you discover related to spells and enchanting