in dmc1 he took on mundus with spardas power, in the anime he absolutely OBLITERATED sid, he kicked so much ass im not even sure that sid is the one responsible for putting him there, sid has a power level about equal to mundus at the end, mundus is often referred to as names used for the devil, such as the prince of darkness, i know little of christian lore not concerning hell or the devil, as it holds little meaning to me, but if i understand correctly, at least one of these could kill the devil which puts them on equal ground at the least.
the question then i guess is, what powers do these angels have and how did the fight against lucifer go? if it was a close victory, Dante clearly owns, if they owned and one shotted him then they would equal to Dante, so therefore i'd be forced to place them on equal ground and look at their skills and abilities.
HOWEVER, angelic weapons and other holy things hurt only demons right? that's how holy water is supposed the work?
if yes, they would only have their weapons at half-effectiveness, or less as Dante's power apparently comes mainly from being human.... because science!