@inside: Durge has some pretty high showings. He's kind of all over the place. But in a team fight like this, he will be very useful seeing as it takes so much to put him down and Vader/Dooku won't be able to give destroying him their undivided attention.
It doesn't when an extremely suppressed Jiren is more powerful than merged Zamasu, who was a match for SSB Vegito. Suppressed Jiren being weaker than later iterations of SSB Goku and Vegeta, Frieza, KKx20, UI Omen, Broly, and of course Gogeta himself. Meaning that, due to sheer power increases, black arc Vegito is not in close to the same ballpark as even base Gogeta from the Broly movie.