[Help with a Drk/Rad build]

I appreciate the builds. Currently at lvl 43. Got a few more to grind out and I'll give these a go. 

[Help with a Drk/Rad build]

So I've looked through the dozens of builds in this thread, and haven't come across a dark/rad. I was thinking with all the debuffs that it would be a decent pairing. Granted dark isn't huge in damage, but the -defense, -resistance from rad would compensate a little bit. Any thoughts or builds would be appreciated.