In game engine terms, armor itself is "Resist normal weapons", as far as damage assessment goes. So a Shield spell is effectively a Resist spell for that type of attack.
I've played various combinations of resistances, from full to none, on each of the damage types and I'm heading in the direction Acadian's already trodden of building a character that avoids rather than resisting, just so I have to think about what I'm getting into, and how to play the current situation with vulnerabilities to certain offense. However, the way the game's currently set up, it appears that it's almost impossible to make a melee character that doesn't need huge reflect/resist/absorb at high levels, so the Archer/mage is the only viable build to do that.
I'll still use a virtually invulnerable tank for mod testing, just so I don't have to TGM to avoid the test character dying, so that will probably be one of my melee builds. I have one with 101% reflect damage and 100% resist magic, and another (Atronach) using 100% absorb spell instead of the resist.
She has an amulet that fortifies her Intelligence, because she's blonde, and she really, really needs it.
makes me wonder if I can't make a mod that darkens the character's hair as their intelligence goes up.