I'm currently working my way to tier 3, i've already researched some of the best equipments for end game, and here's my currently used equipments:
-Dusker set (going for vog cub)
-Horned owlite shield
-CIC and sealed sword (going for CIV and DA)
-Pepperbox (gonna replace it with polaris and blitz needle)
Is there anything i missed? anything i need to improve?
feel free to give tips and suggestions!
With an Avenger/Faust combo, you can hit everything for at least neutral.
I agree with Fradow, get a shadow weapon, friend.
If you haven't already, read the "Damage" page on the Spiral Knights wiki, and learn the vulenerabilities and resistances of the monsters. Make sure that you own a piercing weapon (e.g. Blitz Needle), an elemental weapon (e.g. DA), and a shadow weapon (as suggested above). If you can equip all three, then do. If you can equip only two of them, then consult the gate map and pick the two most promising ones, based on the stratum you're entering. With two of the three non-normal damage types, you can inflict huge damage on 4/6 on monsters, and moderate damage on the other 2/6. This is what Skaiwalka was talking about.
Just go in groups when you start out. Makes things a lot easier.
CIV and DA seems a bit redundant. For undeads, you are better off using the DA. For a general purpose sword, the Leviathan is a little better (except if you hate the knockback because you play mostly in a party).
You'll probably want a shadow weapon, as you don't have any : Gran Faust, Acheron, Biohazard, Shadow Driver, pick one. In particular if you farm JK (which you should be, it's the most profitable T2 gate most of the time).