Is everyone forgetting Psychic Battle Squad? That unit was the death of Nob Bikers and it still is...
my hat is still red
10 Nob Bikers + a Warboss = Fearless. Also, the pro players(read: WAAC douchebags) will ally in a farseer with RoW to sit in the corner and make psykers work harder.
Give a man fire, and you keep him warm for a night.
Set a man on fire, and you keep him warm for the rest of his life.