This is somewhat true, with the major caveat that it isn't that easy to consistently get three headshots against all bosses. Basically, the boss has to be stationary, AND you have to not be drawing heavy fire or at risk of dying. In a few situations, this is solid gold, better than Gjallahorn. But it's really "a few" situations. Example - against Urrox, I only got White Nail to proc a third of the time or less, because either a) he'd step behind a barrier so I couldn't get a headshot from my vantage point, b) he moved as I shot, c) a witch started blasting me or thralls rushed me, forcing me to move prior to m third consecutive shot, d) he did his ground burn thing at the wrong time. Against the walker in the Tanniks strike, you are exposed to tank shots. You usually can't stand there and constantly pump shots into him, because the tank can one-shot you, plus you get rushed by sword guys and exploding shanks. You might string 5 or 6 shots together but not "infinite." P&T is better for that tank, IMO, due to the active camo perk (you can get in position without the tank aiming at you), especially on arc burn. Against the devil walker on the Sepkis strike is where it's OP. You can stand on the building on the left and be completely safe from attack, shoot the tank non-stop, and it's dead in seconds. But so what? If that particular tank takes ten minutes instead, how does that really change the game, except to make one part of it more tedious? Has anybody failed to beat that tank in the last six months?