Assassin’s mark worth it?

So I’m doing very well with cyclone slayer build, and I see almost everyone uses assassins mark with mark on hit. I’m set up for it, but it rarely procs power for me. I get endurance and frenzy almost instantly with others because of how they proc, so really worthwhile, but assassins mark? And never more than 1. Yes, I know only rares and uniques, but even so…

What am I missing? Would delete but like 90 percent of builds on Poe ninja use it!

I believe it is mainly used for the increased crit chance and damage. For that it is quite useful.

Your Assassin’s mark is imbued with Spell Totem ;)

Oh wow totally missed that!!! Can’t wait to try.