Sorority Horror story

Hello, I know that sorority tanks tend to be a hot button topic (for good reason). About a year ago someone I know had to rehome his fish (a sorority). I have experience keeping Bettas but didn't know much about sororitys but it was life or death for this fish. So I took them in and I upgraded their setup and things seemed to be going well....until they weren't. There was a death a few weeks ago (still have not found cause, parameters all good, no damaged fins or signs of foul play) and when looking into what to do most info I found recommended getting another tank mate. So I did. And THAT seemed to be going well until this morning when I went to check on everyone and I found that someone ATE their sorority sister. And now I simply do not know what to do. I feel like many will tell me to break them up, and I'm not against the idea but it'll take me time to get the proper set ups for them so I'm not sure what to do in the mean time. Any ideas are welcome.