Tornado Shot-Phys & Crit w/ Elemental?

hello All

I'm new and still learning but I have a Level 45 Ranger I'm doing a Tornado Shot Physical Crit Build that so far has not put elemental in the mix. I'm seeing areas on my Skill Tree that are full of Poison & Chaos, Cold and lighting nodes.

So is it worth looking into, adding some, a little or skip it with the primary damage as Physical & Crit? Just wanting to hear from those who have been around PoE a lot longer than I have and has more experience with Damage Types. Thank you...