hhmm....what about that situation?
an archer is supporting his last melee friends by shooting into melee and killing 5 guys of the enemy team, before he and his companions die...
That would be something indeed.
Archers very rarely get valor anyway, due to crappy shooting speed and slow dogeable arrows - we dont get the kind of boss behaviour required.
In fact I propose increasing the valor chance for archers, since it's apparently much easier for infs to get it with the swing spam.