It's not even necessary to diaga the enemy in RvB. We usually have a kiter (/THF) and 2 BLMs. The BLMs get into position, buff up and when ready, the kiter talks to the NPC at start. The kiter then runs close to Rauhbahn, pops flee and runs nearby to aggro them (and start running for the start/chest). The BLMs usually kill Raubahn in 1 volley of nukes each. Alternatively, a SAM could take BLM's place, making sure to meditate upon entry and have meditate ready before the kiter begins.
Never gotten less than 1666.
RvB really makes for easy Ap.
However, if you only start doing it and are not very experienced with it, you can start doing it with 4 people for an easy guaranteed win.
We did it with following setup when we were doing it with four, slight cut in AP compared to doing it with three, but still worthwhile for an assault of 2-3 minutes max:
1 random job really no matter at all that will start the assault, and just stays at start
1 WHM/RDM (me) as kiter: Stoneskin, Blink, Phalanx, Earth Staff, shell+prot5 are good for damage migitation. as soon as the "random job" spawns Raubahn, i Diaga him, and then kite away all his adds.
2 random DD/nuking jobs. while i kite away the BLU adds, they go to work on Raubahn, and mostly finish him within 30-60 seconds, depending on what jobs they are. SAM is great for this job btw
Edit: Before the "random jobs" starts the assault, me and the other two jobs went to Raubahn's spawning place. This way, no running through enemy NPCs is needed, and Raubahn is killed so fast, that the NPCs at start are never in danger.
Super quick and easy fight with guaranteed win. Would not recommend doing it with more than four people though, because of the AP cut.
After doing RvB with a /SMN pull, I never want to bother kiting again. RDM/SMN, SAM/WAR, and WHM/SCH, with the WHM/SCH staying at the start and healing the NPCs. I thought it was easy before, but wow. If the RDM doesn't need to cure, he just nukes to end it faster.
RvB hands down the best. I go w/ RDM/WHM BLM/RDM x2.
RDM stays at start to pop/heal NPCs. Myself and another blm go to Raubahn. Once popped I immediatly start nuking and the other blm starts a split second after. I kite away w/ gaiters, other blm sleeps>Freeze IIs Raubahn. Win.
Takes us longer to go back to turn in tags and get new ones than beating this assault >_>;
Saving Private Ryaaf:
On a slow day it takes 4 min, on a good one 2.