Probably the most important tip for the entire game:
-You’re a medic drawing aggro in an attempt to protect the sharpshooters/wounded teammates
-You’re a Support Specialist packing a superior shotgun
-You’re confident you can kill it with minimum fuss (in the case of a Sharpshooter)
Do not fire upon Scrakes or Fleshpounds. Drawing aggro if you have weapons that aren’t designed to kill the larger Zeds would only make the bigger Zeds angry, causing them to charge. Charging Scrakes and Fleshpounds make for agile targets, giving Sharpshooters a hard time bringing them down.
In maps where the squad makes a stand in a corridor (KF-BioticsLab and KF-Offices come to mind), mind your lateral movements. This is to ensure that you don’t inadvertently block the aim of Sharpshooters.
The Crossbow’s ammunition is VERY expensive. If you see an ammo crate, give it to the Sharpshooters. Of course, this is a case-to-case basis but in a team with lots of Firebugs and Commandos, Sharpshooters oftentimes do not shoot minor Zeds willy-nilly and instead reserve their shots for the larger Zeds resulting in less gold raked in.
More tips after the jump.
Do not forget that with your +XX Body Armor perk, you are Killing Floor’s tank. Act accordingly. You might not have the firepower to take down the bigger Zeds but if you see a Scrake or a Fleshpound charging for your teammates, intercept the undead and try to force it into attacking you.
Your first priority is to heal your teammates. Unless you’re packing heavy firepower in addition to a medic gun, it’s better to concentrate on healing rather than trying to outscore your teammates. Remember, as a medic you’ve the weakest weapons; better to leave the killing to the other classes.
As a Firebug:
In earlier waves, you really can’t do much with only a pistol or a Mac 10. However, take note that when you reach Level 3, you will have incendiary grenades. Use them; they are a great way of racking up kill count (and hence your gold) if used properly. Try to throw your grenades at masses of Zeds that your teammates aren’t focusing on to net you maximum kills.