I always have trouble deciding which trait is better when I have to choose between 10% crit chance/damage or 10% sword/shielding skill for auto attacks.
I will use Rending Inferniarch Slayer as an example:

With this question, I want to focus on what will give me the greatest benefit in the hunt, assuming I have 125 sword fighting.
Another example could be +1 sword fighting or maybe +2.50% crit chance for auto attacks?
I'm not sure how exactly I should calculate this and what to focus on, so I'm asking for specific answers.
How to choose the right traits and what combinations are best?