My setup depends on what I feel like doing at the moment I guess.
Defense: Rail gun, Plasma sword, Nell, Skill: +30SP (just have the sword and SP for when my team constantly rushes, I'll join them instead of sniping and try to score as well).
Defense/Offense: Sentry, Sub-machine guns, Smash Rifle, Skill: Wall (usually can kill like 5 ppl before I die once in Tunnel map. Read in a guide that aim is more important, and I guess they were right haha)
Balance: Sub-Machine gun, Plasma Sword, Revolver, Skill: +30HP (Just a good build overall I think)
Offense: Sub-machine gun, Hand gun, Plasma sword, Skill: +30SP (A complete rusher. Just try to pick up the ball and score)
Chaser: Rail gun, Bat, Nell, skill: +30SP/Anchor (If I'm not targeted, I'll constantly knock the chaser down with a fully charged rail shot, and when I am targeted, I'll bat the chaser away. The nell is just for some extra annoyance. Only hard thing with this build is that I need to kill with only Bat mostly, but its easy to use once you get the hang of it).
Sword Matches: Counter sword, Plasma sword, Bat, Skill: +30SP
Clothes: I usually don't ever wear clothes, but if I ever do, I'll only add SP.
Weapon strength: I only use +0/1 equips. Don't bother with AP or fumbi.