It's true, the system does build heroes, and heroes by their nature tend to work alone, although their work can coincide.

And believe me I know how many times Nab has saved mages lives - every time Adiuvo tries to turn an elf against you he comes up against the argument "but I've trusted him ever since he saved my life...". ;)

Guards should be able to adapt to the skirmishing style, yes - we could all probably do with putting our minds to tactics a bit more. We're pretty good at strategy within terms of character abilities, as that's basically twinking, however tactics in the moment are rarely given any consideration.