There some thing people need to understand, no peak is suppose to be able to kill everything by himself, It's a COOP game.
The SS is the only exception.
My class:
SS: Pistol, HandCanon, Crossbow
I hate the M14, sharpshooter aren't suppose to spam...
Same thing for Dual HC.
Use your weapons only to do headshot, pistol, handcanon for averything under scrake, and Crossbow for Big guy.
Commando: bullpup, scar
I hate the Ak, to much recoil.
The bullpup as a lot of ammo, low recoil, good sight, good for headshot or spray on lot of specimen.
The scar for everything, Never use auto-mode except for scarke, fp, patty, try to do headshot, it's so easy.
The commando is my favorite class, it's so good.
The scrake: Wait till they start ragging (50% of the heal bar) and empty your scar clip on full auto in their head, them almost anyone in the team can finish them easily.
FP: Don't enrage them, you will die, if you spray them when they are enrage you can do really good damage to them, and help the team kill it.
Patty, Check is heal and report to the team, follow him when he activate is camouflage.
Medic: MP7 + crossbow
The crossbow is only in extreme condition (when the rest of your team is occupy).
You are not a fighter, you are a medic, do your job and everyone will love you.
A good medic can save the team a lot of time and from a lot of thing (game when everything come at the same time (siren, husk, gorefast) everyone get hit and lose lot of HP, and you keep them alive till the rush is finish, after you heal them completely really fast by switching MP7 and seringne(damn, i don't remember how to write it).
Berserk, I never play berserk, I'm not good.
Demo: Enjoy annoying everyone, this class don't even require skill (or people don't have them).
Firebug: can kill everything except scrake, fp, patty, husk.
This is a good class, but you need to have the good technique to don't waste your ammo.
The firebug don't get money when people kill the flaming Zed (Need to get fixed).
Support: Every weapon combinaison is good in certain situation.
Good class, well balanced, do your job. When scrake rage, dual shotgun them to kill them or take lot of heal from them.
Remember, this is a coop game, you are not suppose to take out everything by yourself.
And for the thread reply:
Commando are really good, they can decapt lot of specimen, they can spray since they have lot of ammo. They are perfectly balanced.