You don't want HoR earlier in the toon's career's.
You can't get into H HoR with anything lowering than a 4600 GS (proved that today)

Heh retsx4 is kinda hard if you havent set up the macros to repentance everything
I think once you figure out a way to mass repentance everything, it'll be cake.

Idea:
Every mob type has a different name, and one only get one of each type per "wave"
Ret1 - /repentance mage
Ret2 - /repentance priest
Ret3 - /repentance hunter
REt4 - /repentance rogue
(one macro per pally, all on the same button. one button - everything stunned)

Max pull is 5 mobs - so you can take out 4 right off the bat! Then you've got 4x holy wrath to keep them locked down as well.