I definitely wouldn't build my list around ordnance because it can backfire easily. You might be able to overcome many jouster lists but if you run into a skillful arc-dodger you're gonna lose bad.
That said, missiles and torps can be very decent as a part of a toolbox. One of my favorite toolbox ships is Deathfire with Conner Net or Cluster Mines, Extra Munitions, Long Range Scanner and either Concussion Missiles or Homing Missiles (depending on your budget). It's a nasty little ship because the weaknesses of bombs and missiles cancel each other out. His ability to drop bombs just where he wants them is almost prodigal thanks to the ability to do it after a barrel roll, so nobody really wants to get close to him. However, if they stay at max range, they're eating very accurate 4 dice shots that usually come after the rest of your list has already shot and (presumably) forced the chosen target to burn his tokens.
On the rebel side I've had some success with missiles or torpedoes on Miranda (I prefer Homing Missiles because you can keep the TL for reroll). 5 fully modified dice at long range can be brutal, but not that easy to pull off against high-PS targets.