Light Defenders and Vit builds - Confusion

Grim Dawn Classes, Skills and Builds
1

I’m -very- new to the end game so thank you for your patience.

I have seen a few Vitality builds floating around (Conjurers mostly but a few others), that use the Light Defenders set.

If Im not mistake damage is converted with % damage conversion (Lightning to Vitality in this case) and THEN the proper damage % increase is added (so Storm totem with the alternate skill turns into Vit damage and then VIT +%damage is applied) Is this correct?

So why is the LD set being used with all of its +Lightning Damage - is there something thats allowing it to apply? Is it just that good defensively that it gives up the +damage? The +skills it provides (including Storm totem)?

Is there not a Vit damage set that serves a vit drain Conjurer better late game?

I just feel theres a piece or some modifier Im missing. Thank you for your time and assistance.

2

LD set is very good, but the main reason why it is used even in vit totem builds is because there’s no other set that supports storm totem, let alone vit totem. It’s the best you’ll have at the moment.