Concentrate Area of Effect

It was posted right above, it will work with aura's technically but it will not increase the damage or any of their effects, only decrease the area of effect.

Will this concentrate the effect of firestorm, or make each fireball in the storm have a smaller impact size?

Is there an explanation on what this skill does and if it works with auras? Possibly a link to it.

It decreases the radius of an area ability while increasing any damage that that ability itself does (Auras don't deal damage, they give damage to allies). So it works to a degree on auras but only reduces their size. Seriously though how it worked with auras was literally a few posts up on the same page.

Thank you for the answer but im sorry i didnt want to read through the pages. >.>

Does this work with Minion Instability?

It will reduce the radius of the explosion, but due to technical restrictions the explosion isn't currently damage (The minions can't be forced to cast a skill to explode, and only skills can deal damage).

So, if increased radius can affect Lightning Arrow, will this work as well, decreasing radius but increasing damage? If so, would it increase the damage of the regular arrow hit, or just the additional targets when that arrow hits?

It decreases the area but doesn't affect the damage, because while it does have an area that it hits enemies in it only hits a specific number of enemies, it doesn't deal area damage.