Thanks in advance for the insight:

I decided I wanted to try something different as a tank - I like hybrids, using all my character's skills, and doing something different - so I built a tank set using Pelinal's Aptitude. Now I know; it's not the meta, and I'm fine with that, but I'll go ahead and get the insults out of the way: "noob! scrublord! filthy casual, go back to normal dungeons! Instead of worrying about your crap build, just go get Tava's" - check check.

On to my point: the 5-piece grants a match of weapon damage or spell damage, whatever is greater. With the 5-piece equipped, mine both sit at 1256, however; when I take my helmet off (losing the 5-piece bonus), my spell damage only drops to about 1134. I expected a much more significant drop, because I don't have any points in magika in the attributes, and no extra magika from equipment or enchantments.

A quick breakdown:

Attributes: all health (64)
Max Magika: ~8900
Max Stamina: ~15800
Armor Enchantments: all 100% max stamina
Weapon Dmg: 1256 (with or without Pelinal's 5-piece)
Spell Dmg: 1134 (without Pelinal's 5-piece)

My question is, where is all that spell damage coming from? I was under the impression that weapon damage scaled off of max stamina, and spell damage scaled off of max magika, so I'm wondering why the values are so close even after such a large disparity between my max stamina/magika. Things like my weapon traits (all defending), and my champion point investments (primarily a mix of defensive, regen, and a near-even split for weapon/spell crit) don't seem like they have much bearing or disparity around stam/mag damage.

So in general,

Why is my max weapon damage and max spell damage already so close to each other when I haven't invested anything in magika?

I play an Imperial Templar; do different classes have some sort of innate propensity for certain damage types?

Again, thanks for your insight