Hello everyone. I’m building a dual-blade WH (which is pretty much like this build http://grimdawn.com/forums/showthread.php?p=475788#post475788)
As I’m approaching lv75 I want to ask which ring combo is the best for this build.
I’m using 2 Rings of the black Matriarch. I have Closed fist, Open hand, Lifegiver signet, Belgothian’s sigil.
Thank you 
It looks like you’re not doing much physical damage with that build, not to mention you’re skipping out on using Curse of Frailty if you’re following the build closely.
Both of those would suggest to me that Ring of the Black Matriarch isn’t a great fit to the build. That ring is much better with a Cadence Witchblade who has some poison damage on the side (think of all the -Physical resist from those rings, Curse of Frailty, and Manticore).
For that build, it looks like the Closed Fist and Open Hand rings would be a great fit since you have so much health regen from Blood of Dreeg and Pneumatic Burst. Lifegiver Signet would be fine as well, but I would only take it if you value the ADCtH more than the extra health regen.
Also, keep in mind the resists that they give you. If you want certain resists, you might choose Belgothian’s Sigil or Lifegiver Signet over the Closed & Open just for those.
Some MI rings Viloth/Cronley/Golus, depending on what you have available.
Lifegiver + any good rolled green (Golus or Cronley)