Boxing cardio and MMA cardio are two different worlds. Wrestling takes a lot more energy than standing and boxing, that's a fact. Toney would gas and even if he didn't Tito would take him down FAST and with little effort and absolutely destroy him. Toney isn't in great shape right now and doesn't seem to care either. He has a punchers chance, that's it and it's not a great chance against someone like Tito.
As for Peter, people are forgetting when he fought Klits there was no Jesse Reid training Peter, now there is. That's going to make a huge difference, he's a top caliber trainer and will work on Peter's overaggressive style, his poor defense, and his cardio. He will own this division still, watch. Whoever wins this fight should beat Maskaev anyways so his reign will be shortlived with that WBC belt.