If it is a question about those two, definitely Suros. I find Epilogue to have one of the worst impacts of any gun. It is like shooting toothpicks at enemies. It is fine for taking out void shields and an occasion Minotaur but even just trying to kill Vandals it is pointless. I would say Suros or Vision of Confluence. I used to use nothing but the Suros, that was until I got Vision, now, that is the only gun I use now pretty much. Having an element on a primary weapon is a god send. It fires about the same as a Suros with the automatic fire and since it is a Scout rifle, it gets an added bonus.