Since the CDR nerf, I've been seen saying int was a dump stat. Why do I say this? Well, heres my explaination.
Endurance beats the pants off of it for energy management.
Recovery causes you to gain more energy from energy unlocks and energy builders, and also increases your max energy.
Gear with cost reduction will also beat the pants off of int.
There isn't a whole lot to say to this. Endurance increases your maximum energy by one point(roughly) every point you have in it. Recovery increases your equilibrium nearly as much, but as a primary it also has a specialization that reduces the recovery you need for max energy increases by half.
Endurance is also the alternative main stat for overdrive. It also works for ionic revirb for electrical users(if your pure electrical).
Recovery also helps overdrive tremendously, probably more-so than endurance does.
So for damage toons, using concentration and ranged, there really is no reason to touch intelligence anymore. You'll want ego, of course, but for energy to dish it out, endurance and recovery just out-perform intelligence on the energy front by a large landslide. Since the CDR nerf also impacted the energy unlock molecular self assembly, any smart player can bet that your only going to be seeing pistol/arc lightning builds anymore.
So where does this leave intelligence? Where it was in the old days, a dump stat. Because anything it does, something else does far, far better.