As opposed to spells cast "innately". Might be a dumb question but just wanted to be sure.

Yes, it does. It also affects the durations of scrolls.

 

It also affects those spells and other effects that come from items (items with overbearing, stunning, spell holding, desiccating, spell binding, spell striking, spell chance and so on). Also auras that are on items (Zephyr, Herald, Harbinger and so on).

 

So it besically affects everything that has an AoE and/or duration, no matter if it's your character that has the talent/ability/spell or if it's any item that gives you said ability/talent/spell. Basically (code wise) the item will add the talent/spell/ability to your character, so it's all the same.

Edited August 28, 20178 yr by Boeroer

Surprisingly, even a barbarian's carnage's area is based on intellect.

Also surprisingly, effects that deal X damage over time also have their duration extended by intellect, but NOT their damage, making them LESS effective the higher your int is.

The last one is not true. At least not entirely. There are DoTs that profit from higher INT, like Envenomed Strike, Deep Wounds and DoT spells like Shining Beacon and so on. Those do X damage per tick (every 3 secs usually) - and more INT adds more ticks. So the amount of damage is higher with mnore INT. Here, MIG will raise the damage of each tick.

 

There are others like Wounding, (Runner's) Wounding Shot and Enduring Flames where the amount of damage is not dependend on INT. Therefore, adding INT just spreads the damage over a bigger timespan (which can be especially bad if the DoT effect has to overcome DR an is not raw damage) and surely lowers damage per second. Here, MIG will raise the overall damage so to speak.

 

The rule of thumb with INT is that it affects everything that has an AoE and/or duration. And generally more INT is better. The only exceptions are the things I mentioned above.

Edited August 28, 20178 yr by Boeroer