51 RB in raids REQUIRES crystal to be even withing 200 dps of competitive.
51/13/2 champ rotation, without crystal, just replace Fierce with Power Strike.
Rest of the rotation remains the same. (this is what many players do when on a AoE boss fight switching from ST to AoE regularly)
51/9/6 can do pretty good without crystal as well, but you will have to replace BF with Punishing Blow.