First, don't wait for an answer through the Guild Recruitment forum. I'd recommend asking someone in Haven for an invitation into their guild. You want someone who seems nice, not someone who seems rich or powerful.

Second, which rank mission are you currently working on?

Third, even if you use only mission-issued standard gear, you will soon receive a massive upgrade from 0 stars to 2 stars. Then you will have Calibur and Blaster (and Blast Bomb). Your killing power will skyrocket. So be hopeful. :)

Finally, your play style will not really change, because Calibur and Blaster are basically more powerful versions of the 0-star weapons. So, while you wait for them, practice the following play style.

1. Charge your sword. While you are charging, you must keep moving. Never stop. As you move, try to cover as much ground as possible. For example, it is better to run in big circles than to shuffle back and forth between two positions.
2. Run toward a monster, release your charge, and run away. Then go back to Step 1.

With this play style, you are still vulnerable to projectile attacks, but you are essentially impervious to melee attacks, as long as you have room to maneuver. Try to make it through a melee-heavy level with taking any damage at all. I'm not kidding. You can do it.

This is how most experts play Spiral Knights. Powerful weapons, weak armor, lots of dodging.

General advice, if you're asking for help with a mission, you're probably better off saying the name of the mission, in addition to the mission number. There are like 100 missions at this point, and most people don't know the specific number of individual missions outside of special missions like Built to Destroy and King of Ashes. As a really old player, saying 3-2 is mostly meaningless to me, but I do know Shadow of the Beast refers to the Gloaming Wildwoods and the lair of the Snarbolax because it's a unique area.

That said, according to the wiki, most of the 3-2 missions feature pierce weak enemies and enemies that are dealing pierce damage. If you can, perhaps try to get your hands on a Flourish. For armor, I recommend the Wolver set. It'll cost more than your standard cobalt, but it'll work out better in the long run. They should be available in the Hall of Heroes.

3. Yup, already got them. Haven't yet tried them, though.

I don't understand this part. For what are you waiting? Are you trying to fully heat your 0-star items? Just stop. Soon you will sell them for 1 crown each, because you will never use them for anything practical.

That's fine, that you haven't tried them. We're not here to boss you around. :)

You are right that the charge attack does not generate much higher numbers than the regular attacks. But that is not the point.

The point is that the charge attack knocks the monsters away from you, giving you room to run around and charge your next attack. The monsters literally cannot melee against you, because at any given time you are either (A) far away from them or (B) unleashing a big attack and interrupting whatever they were doing.

In the case of the Calibur line, there is a second point to the charge attack: Because you spin around three times, a single charge can hit a monster up to three times, thus doing quite a lot of damage. This tactic works best against stationary targets (such as gun puppies), knockback-resistant targets (such as giant lichens), and targets pinned to a wall.