Also, trying to compare something that clearly took time, coordination and numbers on behalf of the Sentinels to individual planet buster attacks, for example, is creating false equivalence IMO. Using that type of logic, Asgard bringing the Nine Realms under its control is a single feat.
But it is obvious what the OP is trying to do. Individually, the Future Sentinels have zero onscreen combat feats that put them up there with the really heavy hitters, so he has to resort to this type of thread in order to put them on that tier.