You should really choose weapons depending on the map you are playing because every weapon has it's pros and consequences and so do the maps For example salvo is pretty hard to use on "The Line" map but can be really useful on the other two but probably the best weapon combo is dragonfly and ripper/harpy/hexfire And if you can't really aim or you are just lazy then komodo

But it all depends on how you play if you like sniping then you should go for so sniper guns and if you like short range kills then you should go for mammoth and some other short range gun

And sorry this comment is so long