I ran a duelling test between comparable non-proc builds.I found both to be viable, light gives you more damage and heavy keeps you alive longer.
IMO you should try both. I run light from time to time just for the fast-paced gameplay, but usually run heavy so I don't blow up at random times.
I don't play duelling builds. Look at what I actually run! Do those look like duelling builds to you?? I duel, because it's more consistent than going into open world. I duelled against a friend who is actually slightly better than me and who puts out a lot of pressure. He also plays open world builds. Just about the best person I could face.You can't compare dueling builds to open world builds, not even in the same ball park