I would prefer to stick with my GE, but adjust to what would work in Gold if I'm there.
The Valiant seems OK except for the headshots that bounce off of stuff like Phantoms. I just got the Vulnerability VI I mod which claims "Aim will be autocorrected to maximize damage" on the Manifest but just reads as 8% headshot boost in my inventory. I plan on carrying that a while to see if the autocorrect thing is even a bit true. I notice a tendency for the left trigger squeeze to not zoom me in on the target on which the reticule was centered, and I'm trying to keep from moving the left stick, so the snap-move to zoom and fire three times I've been doing isn't perfected yet. When it works, it's like the opening credits for The Rifleman and it's cool. When it doesn't, well, it's just embarrassing.
The Geth SMG? Well, it's almost weightless, although it's more weightless when carried alone than it is with the Valiant. That certainly makes it a close-quarters helper in Bronze and Silver, but if I need assistance to hurt an Atlas in Gold it's not exactly a lot of good. Anything heavier and I'd go for Overload and be sadly disappointed. Rock, meet hard place.
The biggest problem I have is Squishy Geth Syndrome (SGS) where I'm down more than I'm up. Perhaps I should never be more than 10 feet from my turret in Gold, but it's not a healer model and I don't plan on making it one. That means at best I get shields back every 8 seconds, and something has changed recently where I get staggered and they refuse to start regenerating for 2 or 3 seconds. The stagger part is ANNOYING: I tried to run left and on the screen I ran right. Nearby enemies LOVE that.
Zero guidance from the team hurts. I tend to focus on what's at hand, and miss when they run away. Not sure if they are in a Party or if they just don't talk. Since solo Atlas kills will be difficult in Gold, I'd like to know where they are for our mutual benefit. Just sayin.
Still haven't found a different class I play any better in, so I'll keep plugging along and hope for the best...