I have been looking for a matriarchal bow as well, running pits on various characters over a couple weeks and I've hit just one matriarchal bow in all that time. It was a +2. Rng is rng but dang man it's seriously like thousands of runs with only one matriarchal bow. Actually I did hit another one a magic one. I gotta think it's an alright place to get one after enough time right? Cows has to be better on higher player settings I just haven't been in the mood to go hard on base hunting more kinda focusing on grail items with a secondary goal of matriarchal bow.