Ok fellow barbs got a frenzy question

I’ve come up on 2 Lo runes… I’m currently using double Oath eth balrogs with Duress archon for my armor

My question is, given what i have and my budget for the biggest upgrade do i:

Go double Grief phaseblade?

-or-

Grief phase + Lawbringer phase + Fortitude archon?

Thank you for the insight and advices.