Any suggestions on a weapon build to beat Void Purge?

I'm looking for a build (Descendant and weapon) that would be a good fit to beat all 20 levels of Void Purge, focusing on using weapons and not so much only about skills. Any suggestions?

I absolutely love Thunder Cage and extra points to you if you come up with a build using it. Even if we end up swapping to another weapon when focusing on a single elite or the boss.

Cheers!