In the version 1.9.0 we add a new blend mode.
We watch the interesting video that you have shared, we discover that to simulate the Blizzard BlendAdd effect, we should work with a 2 pass shader.
It's possible to do it be we need extra coding, Blizzard use is how engine and we beleive that is more flexible for them to recreate this shader.
We need to work around it, but your request is available :)
I did but it didn't show up there.
Turned out there were some errors with missing things in one of the project's folders (Infrastructure), which prevented it from loading up.
The project's programmer helped me fix it.
The main advantage is that Shadero Sprite is fully design and study exclusively for 2D Shaders
We have many premade effect node for 2D games ( and the number is growing), and it's a easier to work with because all the parameters are visible on the node.