I'm wondering how elemental weaknesses stack across your gear. More specifically, I have a skelly helm, a magic cloak, and an owlite shield. Does the skelly helm's fire weakness get canceled out by the shield and cloak's fire resistance? I may end up keeping the skelly only for cosmetic purposes (thinking about replacing it with the chroma line), but as a low end Tier-2 knight I want to spend my money carefully. I'm also aware that varnaduke's attacks do fire damage; would the fire weakness be detrimental or would he just destroy me regardless :P ? Any advice about my armor is welcome.
While we're at it: voltech or cryotech? I'm a swordsman looking for a gun to complement my arsenal.
Shield and armor defenses are counted separately so the Skelly's negative fire won't be canceled out by the shield's fire resistance. The Magic Cloak's fire resist will help to cancel some of the skelly's though. Skelly armor is great for fiend levels, really absorbs that shadow damage. But as you mentioned, don't bring it into FSC without plenty of experience avoiding fire.
Chroma line is actually a decent choice for armor, it isn't a popular choice though. Its advantage is that it gives a slime bonus to all weapons... but slimes are already one of the easiest things to kill.
I'd go Voltech, I prefer shock over freeze in guns. The Cryotech has the annoying quirk of breaking its own ice. Even so, the Cryotech is better for kiting mobs than Voltech because it can stop enemies cold, so it somewhat depends on your goal for carrying a gun... simply adding a ranged weapon or specifically to kite?