Basically I'm a holy MS and therefor not very experienced as Retribution but like to play around with it on dummies.
Armory: http://eu.battle.net/wow/en/characte...aymen/advanced
I usually do around 17k over 3 min. (probably waay to low... o well) and usually pull around 21-22k in BH 10.
I use clcret and pretty much follow it.. Popping GoAK at start of fight and once I have some stacks I pop Zealotry and AW.