I have those specs as mentioned above, however I’m getting a constant FPS of 120-190, constantly dipping with any movement I make. Playing on 1440p and all low settings. Help please

In general, what (Non-Duelist) agent is the most useful for a team to have that doesn't require line ups to reach their full potential? Lines ups are of course not required, but it is a part of using their utility to its fullest.