I'd at first dismissed Ordnance Ten: crit bypass only comes into effect when you'd otherwise miss which makes damage based ordnance inferior to the Mangler Cannon. It hadn't occured to me that he's effectively a torpedo version of Lieutenant Blount with Guidance Chips, and unlike Blount he gets two shots.
^THIS^
no doubt that guidance chip works superbly on Ten but still that is only 1 guaranteed damage which Mangler kind of does so (mangler's weakness is sensor jammer). But then again there is still the point expenditure and also what else. IMHO I think if guidance chip was to be used on Ten Nunmb it would be with Plasma Torpedoes and EM to ensure that you do no less than 2 damage a shot. But again 36 point B-wing makes a nice B-wing trophy on your opponent's MOV rack and that is not including B-wing power upgrades like sensors and cannons.