I uѕе 2 setups currently.
5 medium electron blaster t2s
web/20k disrutor/mwd
800mm crystaline/3 hardeners/medium rep
5 valk 2s
With this setup you do deimos damage ammounts over 3 damage types and also have nearing 4k armour(more with gang bonus'). It's awsome and will easily take down lower skilled bs pilots and some hacs/recons.
5 small nuetron blasters t2
mwd/20k disruptor/medium cap injector with 800s
1600mm plate/ 3 hardeners/ medium rep
5 valk 2s
This has near 6k armour(more with gang bonus') and can run the repper for a long long time with the 800s. Doesn't do as much damage but lasts over twice as long.
Personally i've never come across any better setups. And i've toyed with quite a few. You can also check my kills with the rax on the snigg killboard. :

okes tongue at barock:: :P