Not any longer. Changes to the cooldowns on some abilities have resulted in a rotation-less system called "first come first served". Abilities are used as they come off cooldown, and if multiple skills are available then a priority list determines which skill to use first. Set bonuses affect the priority, and skill is determined by how well you can adjust those priorities depending on the encounter. Undead and AoE are exampled of when things might change.
The following is copied from my favorite place for class information, ElitistJerks.com forums:http://elitistjerks.com/f76/t68951-retribution_updated_3_3_a/
Basic clash resolution is as follows: HoW > Judgement > CS > DS > Consecration > Exorcism > Holy Wrath
At T10 levels of gear, Judgement > DS > CS > HoW > Consecrate > Exorcism > Holy Wrath is theorized to be the most dps.
If you have 2pc T9 equipped your best clash resolution is: Judgement > HoW > CS > DS > Consecrate > Exorcism > Holy Wrath.
If you have 2pc T9 AND 2pc T10 equipped, your best resolution is: Judgement > DS > HoW > CS > Consecrate > Exorcism > Holy Wrath
If you have 4pc T10 equipped, your best clash resolution is: Judgement > DS > CS > HoW > Consecrate > Exorcism > Holy Wrath
Remember that no matter what priority system you pick and use, we're still bound to FCFS.
Judgement - Hardest hitter, returns mana, can't go wrong with this as your top priority.
DS - DS only pulls ahead of CS with 2pcT10 equipped, as its' effective cooldown drops to 6 seconds, and it hits much harder than CS does.
CS - Because of the short CD and ability to proc a seal, you want to keep this on cooldown as much as possible.
HoW - This skill only comes into play when a mob is at 20%; it then becomes high priority due to it's extremely high crit rate and fairly short CD.
Consecration - Consecration moves near the top of the pile only against multiple (4+) adds.
Exorcism - It hits hard, but because of it's somewhat long cooldown (15s) and reliance on spellhit, it isn't great dps. Do not use this on a pull because it will not be instant cast, and will delay entering melee combat.
Holy Wrath - Only effective against multiple (6+) demons/undead, you are better off using your free GCD casting DP or a SS on someone. This is as close to a mana dump skill as we have.