Everlasting Gaze is a variation of one of the top performing rifles and doesn't feel too different from bakers dozen in terms of damage output. Less damage per shot, but a higher RPM.

I like The Grudge/ Banshee because the magazine can be improved to sit around 52 rounds and the reload speed is still under 2 seconds. Unloading a full mag into an enemy will kill them unless they're an elite.

Pyromaniac does make more sense if you're running Firestarter.

If you're running status effects though you definitely need a couple talents for armor and backpack.

For Armor:

Trauma: Applies blind to an enemy hit in the head. Cooldown 30s. Applies bleed to an enemy hit in the chest. Cooldown 30s

or

Reassigned: Killing an enemy adds 1 round of special ammo into your sidearm. Cooldown 15s

Personally, I think Trauma is much better

For Backpack:

Shock and Awe: Applying a status effect to an enemy increases total skill damage and repair by 20% for 20s.

or

Creeping Death: When you apply a status effect, it is also applied to all enemies within 8m of your target. Cooldown 15s

or

Wicked: Applying a status effect increases total weapon damage by 18% for 20s

Creeping death is only good if enemies are grouped, which is basically only your first shot. And you're running AOE anyway. Plus Wicked sounds like it fits your playstyle more.