KindaWeirdChampBro
Once Kuromiya gets separated, who would you rather have him be with? Read the creator thoughts to see all the options, but i really think that it would be best for him to move alone in the Soul Society, you can expect quite a few killings happening there. This chapter was posted ten hours earlier in my discord channel (it's free, mind you) so if you want to have a bit more say on what happens there, just join! The link is in last chapter's comment section.
The problem with the "blood bath" is that it will put a big target on him since I don't think the people of the gotei 13 will let him do what he want if he kill shinigami right and left. For him killing a captain? that's the same, GenryĆ«sai will never let him leave alive. Since right now he is more low key, he can't allow himself to kill a higher ranked or too many grunt, maybe have the three betray the Seireitei then have him kill TĆsen? he will say something like "that's why you don't monologue surrounded by enemy you just betrayed".