Bopp's pretty much said it all. you're definitely going to need to focus on one general purpose set of armour and weapons for now and slowly start to branch out once you've progressed a bit further. when i first started i found my self in a similar situation, i liked all the weapon styles and was experimenting alot, but eventually i settled on focusing on swords. i use 4 weapon slots and carry 3 swords (1 shadow, 1 elemental and 1 piercing) and a gun (Polaris). this gives me good coverage against all monster types with my swords, and i use my gun when i need to take things out from a distance. now that I've reached endgame I'm starting to build a bigger arsenal of guns. i also run a bomber set in T2 lockdown.

If you're using 2 weapon slots then I would recommend carrying a sword and a gun of different types, the best combo probably being a piercing sword with an elemental gun. The piercing sword would cover fiends, beasts and gremlins while your gun would cover constructs, undead and slimes. The reason I say this is beacause the main thing you want to take out from range is turrets, and 2/3 kinds of turrets are weak to elemental, the last is neutral to it. An elemental gun will also serve you better in the last wave of arenas, which is usually a heap of mechaknights, and it's safer to strafe around the edges shooting than to run in with a sword. A shadow sword could serve you well but for optimum coverage it would require you to carry a piercing gun. The monsters you would be shooting at with a piercing gun (gremlins, beasts and fiends) dodge like crazy and are easier to take down with a sword (though im sure callahan users would say otherwise =P). Conveniently, a piercing swords' attack pattern is perfect for dealing with those monsters, hitting fiends and beats supereffective and being neutral against gremlins. I wouldnt recommend an elemental sword because most things you want to hit with elemental are easier to take care of with a gun, and it would require you to carry a shadow gun (which I wouldnt use for the same reasons as the piercing one). Please note this advice is for 2 weapon slots, eventually you will want a weapon of every type and when you have more weapon slots available, elemental/shadow swords, piercing/shadow guns can become invaluable.

Now as for the weapons themselves, I'm not going to tell you what to use. That's something you'll have to work out for yourself when you've had more experience and know what style of weapons suit you. I will say though that Polaris is generally considered superior to supernova because of the chance at shock which can make up for the damage reduction and is good for crowd control. asdditionally the elemental damage is better because as i said before, most things you want to be shooting are weak to elemental. normal damage guns in general are considered inferior because guns have low damage in comparison to swords so you always want to try and hit a weakness. also once you get some more swords in your arsenal and have more weapon slots available, a Levi is unlikely to see much use, except perhaps against Vanaduke, but only consider gearing up for that once you reach endgame anyway. the other weapons you listed there look pretty good. i would also suggest you think about the vaporizer status bombs, freeze being great for crowd control and pairs very well with swords, fire does excellent damage over time and clears arenas (assuming they arent fire themed) and jelly palace easily. you'll probably want an elemental and piercing sword to complement the Faust and a shadow and piercing gun (just to avoid potential confusion, by that i mean seperate weapons of course. a split damage weapon like sentenza has only very limited use).

now onto the armour =) as a swordie you cant go past the wolver lines. they have great bonuses for swords. a Skolver set has normal and piercing defense along with max freeze resist and a very high sword damage bonus. Vog Cub set gives normal and elemental defense along with max fire resist and very high sword attack speed increase. Snarbolax is very similar to skolver in that it has the same damage bonus but instead of normal piercing it gives normal shadow defense with less freeze resist than a skolver set but with the addition of poison resist. all are equally good and the one you choose will depend on which kind of strata you run most. for general use, i would recommend vog cub, mainly because the things that hit you most are probably going to be elemental and the ASI will greatly increase your survivability, letting you shield and combo faster. however if you plan to run the jelly palace alot, skolver's damage bonus and piercing defense may serve you better. eventually though you're going to want all 3. the snarbolax set is the hardest to get, requiring you to complete a shadow lair and access the special alchemy machine there. if the wolver line really isnt your thing though, there is a few other sets that may work. Valkyrie or Dread Skelly (now outclassed by snarbolax but is significantly easier to get) sets are good shadow armours, the Chroma lines work well situationally, mainly jelly palace (deadly virulisk probably being the best choice for this due to pierce defense, though i guess salamander might be a decent alternative set for FSC). i dont know much about the gunslinger or bomber sets, so ill leave that for people who do =P.

you didnt mention shields you're interested in so ill give you a few suggestions. my personal favourite is the barbarous thorn shield (upgraded from the bristling buckler, a reward from snarbolax tokens), mainly because the damage bonus is very nice. other good shields are the Grey Owlite for elemental strata, Dread Skelly or Crest of Almire (a reward from vanaduke tokens) for shadow and the Volcanic Plate for all round utility.

wow, turned out to be quite a long post, i hope you find this useful ^_^ if you want to know anything else feel free to message me in game. my IGN is krysophylax.

What Fradow says is good. But I don't think anyone has pointed out the elephant in the room: You want Snarbolax armor. You can either buy it for an outrageously high price (because of the unbinding fee and the Shadow Key fee), which I don't recommend, or you can earn it yourself. But in order to earn it yourself, you must already have some sweet 5-star gear. So Snarbolax armor is not a good plan, for a first set of good armor. You need to get something else first.

You don't need a shadow set in the first place, unless you are crazy and are going to do fiends strats. Undead are not that bad and you don't need to protect specifically against them.

If you need some shadow resist to run shadow snarby lair, Silvermail is a probably a better option. And it can be paired with any normal/elemental armor to have average resist everywhere. And it doesn't have negative fire resist. And it has undead bonus damage, which is arguably better than fiend bonus damage (most players just avoid fiends altogether).

Overall, Owlite is more useful than Skelly, just because elemental is more frequent, and fire and shock are the worst status. But i would advise, if possible to also get a shadow shield. There are only 2, and the other is Vanaduke token reward.