Increase aura effect and is it worth it?

Increase aura effect and is it worth it? , or should i skip it?

Well, without any information about your character, it's hard tell.

Well question is is the % of the bonus given to auras ,really worth it compared to taking other ones? What is the math behind the increase aura effect , because this game is full of misinformation and lack of clarification when it comes to bonuses and % of something

It works exactly as you would think. If you have 20% increase effects of auras and you have a purity aura that normally puts out 20% resists, your aura would be putting out 20% more, or 24% resists.