Out of those, adding BCP to your portfolio would be the best, gives the p2p for staking/selling options (also has good gtd tourneys with VERY easy, albeit lower, prize pools to reach), and a good way to interact with players. I wouldn't get rid of carbon or bovada, carbon an awesome grinder site, bovada got the volume players and soft ring, but with those 3, honestly you're set

Saw your other needs and remembered, these are the 3 most reliable for payouts too, so def stick to these, and GL