I am close to making my first five 5 star set complete, and before I really began to upgrade my gear I started to plan and acquire other weapons and recipes for when I would go into a more specialized route. I wanted to ask opinions about some of my choices and maybe get suggestions of things to add as well.
My current load out is
Nameless Hat
Ashtail Coat (Planning to make this Snarbolax Coat)
Barbarous Thorn Shield
Dread Venom Striker
Valiance
Other pieces in my possesion
Brandish (thinking Combuster with this and have obtained up to the 4th star for that line)
Snarble Barb
Catalyzer
Magnus
Prismatech Alchemer
Antigua (I had the Gems and I did not want to get the Sealed Sword)
Magic Hood (was my 2 * helm before I got the Gunslinger hat)
I've also learned the recipes for the Wolver Cap, Gunslinger Sash, the Night and Silent NIghtblade. I'm looking also at the Armor that forgoes Normal Damage for a Piercing/Shadow/Elemental Split instead but not sure yet...
So it seems that you're into both swords and guns. And am I correct to infer that you use two weapon slots?
Currently you're using two normal-damage weapons (DVS and Valiance). Normal damage is okay; no monster resists it, but no monster is vulnerable to it, either.
If you haven't already done so, read the wiki page on Damage and learn the monster vulnerabilities and resistances. You want to own a piercing weapon, an elemental weapon, and a shadow weapon, and carry at least two of them at a time. The addendum/wrinkle is that, if you're going to carry a gun, then it's useful for the gun to be elemental, because guns are useful against turrets, and all turrets are vulnerable or neutral to elemental.
A classic sword+gun setup would be piercing sword with elemental gun. So upgrade Snarble Barb to Barbarous Thorn Blade and the Prismatech Alchemer to Nova Driver. Great. Also pursue Nightblade/Acheron, and you have a pretty good set. Alternatively, you could go Combuster (Brandish) with Callahan (Magnus) and Acheron, but that is less good, tactically.
Antigua is weak because the two 5-star versions both do split non-normal damage. If you understand the rules of Spiral Knights in detail, this is undesirable. But the developers are currently considering changing this. So keep your Antigua, but do not upgrade it until we see what happens.
For armor, I hope that you know that Snarbolax armor can be crafted only in the Shadow Lairs. So it is not a good choice for your first 5-star armor. I recommend that new-ish players get a general-purpose armor set, and then get additional pieces to build specialized sets. If you get Nameless Hat with Skolver Coat, then you'll have normal, elemental, piercing, freeze, gun speed, and sword damage. Not bad.