So, I've been nerding away happily on my new char.
Thanks to all the expert advice of this thread he has become a real beast, sitting at level 24 right now. Leveling has been quite quick, too. The run clocks at about 40 hours for now--got most of my weekend dedicated to that

.
I am surprised at how efficient the rifle bursts are. Dreadnaughts are one shot with a 120(ish) quality base Huszar, plus a smart module at about a 100. Muzzled, of course.
Other than the Magic Roach Island of Doom, the whole thing has been quite smooth. I should have just paid the man his money. I'll know for the future. Yesterday I was doing the lower level of the Lunatic Mall. Managed to do it twice, once without traps and once with. No real difference, my catch was just to stall their movement at the entrance of the shop so that I can happily spay and dance around the corner. Occasional grenades included. I reloaded the game after that and will fish for some Bullhead Pills today. Want to retry it a few times with those on.
Traps, Stealth and SMGs have been the lifeblood of the build in the early game. Mostly focused on hunting wild life--no Magic Roaches, thanks. The real spike came with Concentrated Fire and Commando. After that it's been spraying for the greater part and at any distance, too. It works! I can see how Calssic XP mode helped me a ton here. After clearing all the Burrowers and scorpion-spiders, the build was at 20. At that point I attempted Balor--first try, easy. Haven't progressed in the arena beyond Master Exploder(name?), but so far all of them have been two bursts each worth of bullets. I only wanted to unlock Ole's special store. Think I'll save Carnifex for when I have really good weapons and armour.
Managed to make myself a 4x Super-Tin and I like it. Tungsten striders, still, but that's only because I had a very good tungsten plate available--more phys resist than anything else around. I am melting moneys whenever I get 3k at a time. We'll see if RNJesus decides to reward me

. I still think that 4x Tungsten is better for the wild life, though.
I took Pack Rathound instead of Gun Nut because I was dying with my carry weight. 240 minimum is what's prescribed for me in this game. After some deliberation the final pick of feats was Conditioning.
All in all--a very nice build

. Thanks for the help!