They're all good weapons, but being someone who tends to over analyze pretty much everything, here are my thoughts:
Don't know your personal style and skill set, but I'd be missing a 4x scoped weapon first of all. And won't the 3rd Eye really pay off if you also pack a Wall breaker of some kind? Haven't tried it myself though, so not sure. And I'm not much of a sniper, so sacrificing a long zoom sniper for a special function is familiar! (I carry an Alien Sniper rifle, for the bounce).
The Adamant Laser and the Multi taskers are kind of similar and one can pretty much do what the other can. Unless you have found specific uses, of which I would love to hear! :-)
So I would probably drop one of those for a 4x, of which there are plenty in both Primary and BackUp.