I do remember a lot of blasters running around with that targeting drone thing going, which apparently let them ignore slotting accuracy into powers at all. However only one secondary set had that power, and since it was "necessary" for an optimized blaster build, there were amazing amounts of completely ignored power sets amongst the min/max people. What's the point of having a dozen or whatever secondary blaster power sets, if the "one true way to play" only lets you use one of them?
I never created a /Devices blaster; with the exception of an Ice/Fire and an Elec/Elec, they were all /Energy, primarily for Boost Range, the "Get
away from me!" tier-1 punch, and the stuns. I wound up building my AR/EM blaster as an exercise in whether it was possible to make Jack Emmet's" 'Range is a Blaster's defense' claim work. And it worked, more or less; done right, she could drop two minions with Snipe before the spawn would react -- she would be far enough away that the first mob going down wasn't enough schrecklichkeit to wake anyone up; it took the second one going down to make them realize they were under fire. LRM Rocket, which she could use at an even greater range (IIRC, its max range with my slotting was 273 meters with Boost Range up), though, would spread enough damage to aggro the whole spawn.