Here's an idea I hadn't thought of when I posted this thread: a squad of 3 nob bikes with a Waagh banner and a weapon or 2. They have the advantage that you get war bikers in the battle force, and due to the fearsome reputation of nob bikers they could really make an effective distraction. But the real question is, is three bikes too few, and should I drop the weird boy/ the mek in order to boost the unit size to 5