Personally, I keep in contact with other mod authors including a designer from Team Fortress and Superheroes. They are my peers. My view from here look like a monitor. Working on FvF2 tends force me to spend a lot of time in front my computer. Making a TC takes lots of dedication.
Nothing beats dedication.
Most groups divide this into sub-roles or add their own specific roles, but the main three roles are always there in some form. If you are starting a TC, you must first decide which one of these roles fits you best. Even if you are starting a mod, you must choose speciality. It is very important since Quake2 uses a DLL with ANSI C source code. For an artist, he must know 3dsmax2 or Lightwave 3d.