I've been running a PS 1 Defender + HLC + SD, with support from Darth Vader with Swarm Tactics, and Captain Jonus with Swarm Tactics and Proximity mines to pretty good affect lately.
http://xwing-builder.co.uk/view/211608/the-dark-defender
You can keep all three in range one or at least keep Darth and Jonus within range one of each other so you can daisy chain the Swarm Tactics. The Defender then has to at least be within Range 1 of one of them to get a boost to PS 9. I plan on boosting this build by Adding a Mangler cannon to the Defender and proton rockets to both the Defender and Vader.
The Defender is not a bad ship, you just can't run it like an Interceptor which is what most people that complain about it seem to want to do. With the right support ships, the Defender can be a good ship to use, and being able to boost the entire squad to PS 9 is nice as I can take down shields with Jonus and Darth, and then unload with the HLC if at 2-3 or 4 regular dice at range 1. If adding a Mangler cannon to the Defender then I can leverage Captain's Jonus reroll ability even at range 1 for a pseudo target lock at all ranges, and also pretty much guarantee at least one crit in the mix.
The Defender point wise is not an easy ship to get into a really competitive build, and it has taken me a while to come up with a combination that seems to work for my style of play. It still needs some more games to see how it works out, but it did well recently against the build that usually eats me up (4 Y-Wings all with Ion Cannon Turretts).