The wiki is incorrect on what damage is where. T3 has normal and types damage. For reference: Melee attacks are either pure normal or a mixture of normal and typed, while ranged and special attacks are purely typed. For example: The underground spikes from slime cubes in Tier 3 will cause pure piercing damage, while their melee attack will give both normal and piercing damage.

Fire does fire damage. The only defense against it is fire resistance. Shock does elemental damage, so elemental defense will protect against the damage, while shock resistance will protect against the damage, duration, intensity, and chance of receiving in regards to shock.

Shock intensity is the same as Shock damage.

It really doesn't, Hex. There's different levels of immunity; WEAK shock (and so on) can be blocked by a max and high shock (and so on) UV, while MODERATE requires iirc max+max+high (don't quote me on this one) and there's no immunity to STRONG damage. Fun times.

Shock resist doesn't ever dampen a percentage of the damage you receive from a shock the way normal/piercing/elemental/shadow do to those damage types. Elemental resist dampens a percentage of the damage-per-tick. Shock resist reduces the number of times you're afflicted but if you are afflicted you take the same damage per-tick as if you had no shock resist, though the number of ticks you take will be less since the duration will be less. Compare to fire damage, where the damage-per-tick ALSO is reduced by fire-resist.

I think it's not accurate to say that the intensity of shock is reduced by shock resist. I don't know what Malsvir-Branea meant by 'intensity', and certainly 'damage-per-tick' is a reasonable interpretation of 'intensity' ... but, damage-per-tick is NOT reduced by shock resist, even if you call it 'intensity'. (Perhaps he meant the time spent frozen with each shock or the frequency of ticks, but I thought those were both fixed values unaffected by any resist).