I would see that one going like the Tybura fight, Titties doesn't have the power or overall striking to consistently take rounds off Werdum imo. In a straight striking match the winner isn't clear cut, but with the threat of Werdum's groundwork he shouldn't have too much trouble outworking him on the feet, and if he can score takedowns consistently it would be even easier.
I had a look at their roster and I still think Goltsov might be his most dangerous opponent style-wise if he really turns a corner. A strong specialist can go from extremely shit to extremely dangerous fairly quickly with relatively fewer and easier adjustments than a journeyman type like Willis becoming way better overnight, and he's also young for heavyweight (that's not to say Goltsov really sucks, but he's not nearly as good as his highlights make him look atm).