Kind of... simplistic and common sense.
Aside from what kind of weapons to use (which isn't even really true) everything is just common logic.
Even within weapon classes, weapons can vary greatly in their purposes and inherent synergy with a player. I.e compact arm, a ranged cont. fireweapon vs taurus. A melee weapon vs end-all arm, a multi-star weapon.
Some real pointers would be to learn to foxtrot. It increases your mobility, inherent evasion, and versatility for all weapons you'll be running and not walking with, but aren't quite brawler claws with speed+4. It's also great for when you're the angel, as you're usually weighted with a slow weapon. So this helps you move faster, and due to the dashes, will give you a chance to dodge some shots you don't even see.
Or to learn the maps, good hiding places, and general knowledge of it to abuse. I.e angels could be using those hiding spots, so check those out if they're not in view.
Not to be a jerk, but this "play the game and get better!" type guide doesn't seem very helpful...
I agree. This is the type of game where you learn as you go. Not only weapon-wise but also how you'll play against the others. You'll need to learn how to assess any situation and use it to your advantage. Learn every arena so you'll know good places to shoot or attack while being undetected or just plain hide yourself.
I would also recommend familiarizing yourself with most weapon types, as being a master of one weapon type isn't going to cut it in this game. You'll need to experiment most weapon types. And of course, experiment the weapons you seem interesting and customize them to your adavntage. If that doesn't work, customize them furthur. That's what the fusion system is for.
And of course, like Isaac said learn how to foxtrot. It increases mobility and evasion, however you may tire yourself quicker so you cannot abuse it.
Fox trot when done properly actually makes you move farther, quicker, and eats less stamina(at least when used on a proper weapon. The slower the weapon is inherently, the more it helps. ). You must be confusing fox trotting for just mashing the dash command.
Example: My speed-4 eyetracks can only go 70 meters running before tiring out. With fox trotting, they go 110. As well as being just plain faster. This is why I'm starting to believe speed-4 to be one of the best modifiers for ranged weapons, as it removes a whopping 30 value. Vastly increasing your overall potential, while not really hurting your weapon unless it's something like a palm, or standing cont. fire weapon.
Also focusing on items is only worth it if you have an item attack mod... as well as use double item. In fact, on a fast weapon like brawler claws (hence where people get the idea of greedy claws from) you don't even really need item vaccuum as you'll be moving so fast. But with item attack +4, stuff like the grenade, up bomb, atlass foot, etc usually OHKO.
There's no real ground for it being superior, or inferior to some other battle oriented weapons. But it's DAMNED fun. Double item is what makes it ridiculous, setting up two medusa heads, two laser eyes, two poison clouds, two up bombs, etc is just crazy. And it happens more than you'd think, but you will need to learn how to properly abuse items. You might also want to try for a FHB mod for more speed, as you'll be able to sustain it better with all the food you should be getting.
Anyway, like I said i meant no harm. However, you should've held your enthusiasm at bay until you could actually make a helpful guide. Though the overall idea is entirely noble and I hope you continue it if done properly.