How to modify a skill via modding?

[Hoo the fool]

Is there any good tutorial or guide for it? I found a guide that introduces how to create a new skill, but it's not modification of current existing data.

I've tried to do it, but it seems that the change wasn't applied...

[Ashiel]

I've had some success with tweaking the basic aspects of a skill. Basically, copy the skill from the "Shared" resources in the Divinity Engine 2, and then past it into the appropriate skills section of the add-on you're creating, then modify the skill there. When you load the mod, it should take priority.

I did this and changed the way several necromancy spells work to make them scale differently, have AoEs, target non-allies, and adjusted their cooldowns.

Mostly in experimental phase. If I have my way, as soon as I get more comfortable using the engine I'm going to make a lot more new skills that offer new playstyles and class creation alternatives (basically skills that lend themselves well to certain archetypal themes like Paladin).