Depends whether you want to go PvE or PvP.
I, personally, like PvE.
That's a lovely combo-thing you have going with your Rogue. Sadly, I know even less about Rogues. Thus far, I like Assassination spec because of the damage-dealing capabilities, but Assassination is likely for PvP.
As a Retribution Paladin, who have been OP'd since the release of WotLK, I prefer to use this little combo here:
Seal of Vengeance (Adds a stack, up to 5, on a target that deals Holy DoT and increases the damage dealt by your Judgement for however many stacks you have) -> Judgement of Light (heals you and party/raid members) -> Consecration (AoE Holy damage over time) -> Divine Storm (Deals 110% weapon damage to all enemies, striking up to three, and then heals you and party/raid members for a percent of the damage dealt) -> Hammer of Wrath (Amazing finishing move).
To increase DPS by an amazing percent for a short amount of time, I use:
<Fury> activates from Banner of Victory, increasing attack power by 1008 for 10 seconds, then I use Mark of Supremacy, which increases attack power by 1024 for 10 seconds as well, along with Avenging Wrath, increase all damage and healing done by 20%. This sudden outburst of DPS + Heroism (30% haste increase) leads to massive amounts of damage. My Hammer of Wrath and Judgement (with 5 stacks of Vengeance) have dealt up to 10k-11k instant damage with this.
Simply amazing.
Too bad we're discussing about two different classes.