Cap alone is enough to take on Nomak. Adding in Bucky, Natasha and Falcon into the mix WITHOUT morals makes it one heck of a beatdown in my opinion. Standard gear would give both Widow and Buck at least dual pistols, Buck (obviously) gets his arm, explosives, a blade and two out of three times, he was seen with a rifle. Natasha gets her "widow's sting" as well. And from what we've seen of Falcon, dude has dual SMG's and considering the area, he has a decent amount of room to maneuver and three out of four members are perfectly capable of working together. I don't think Nomak is walking away with any noticeable advantage here.