P&T is a subpar sniper. Stability aside, it's basically the same as the Epitaph except exotic. Its invisibility is really of limited use, what with the long time before it activates and the limited duration once it does - the usefulness is just too situational to be worth your exotic slot. NLB is a neat, niche weapon, but its [b]TINY[/b] ammo reserve and slow rate of fire make it hard to use, especially against enemies that have no critical hit zone (Minotaurs, for example)