Don't need a Corsair's Roll to break 30k/hr, but I'd say it's hard to really do that without something ridiculous going on, like multiple PLs or all relic DD's. But then again, why would you want a 2Brd PT if you have the option of going Brd+Cor and using exp roll? Kinda hard to beat.
I've seen people claim several times actually, getting 40k/hr with double bard, and something like 2-3 apocalypse parties. After my own test though, I'd say that's a bit of a falsehood, or just extreme luck.
2 Best Camps in the game (assuming sufficient DD's) IMO:
*Middle Birds
*Skoffin Pit
Just because of the sheer number of mobs within a short pulling range that you have access to.
I've done plenty of epic MidBird parties, but only a couple Skoffin Pit ones. Yesterday I decided to double pull Brd/Nin with my friend on Cor/Nin. Got 2 apocs and a perfectly geared Mnk/War, a Rdm, 2 Rdm PL's, and a Sch PL for things like AOE CureIV/Paralyna/ProShellIV's.
After about 15 minutes, I checked and Kparser was showing 50.5k/hr. There was no party at south but a party at north which was slowing us down. After being limited by the presence of that other party, and after having a DD fall to Fang Rush, we were down to about 40k/hr I'd say, after about 30 minutes. Over the course of about 1-1.5hrs, we had 3 deaths because of 1300+ fang rushes. We also had a nasty Nis Puk (windsday) and like 5 air elementals. At the end of the PT I looked and had gotten 30k/hr. I had really inconsistent corsair's roll on me due to all my pulling, so I'm guessing everyone else made around 35k/hr.
Kind of disappointing. I was hoping to get a solid 40-45k/hr w/ a party of that quality. After checking the parse I noticed that one of the Apocs was at 39% on the parse and the other was 25% (this guy didn't even die), so I know we could have done better on DPS. But I think the main limiting factor at least at Skoffin camp is the presence of any other parties in the area, fang rush luck, and also windsday/elemental luck.
For that reason I think Mid Bird Camp without any other parties in the zone is probably going to bring in the highest exp/hr. You don't have to worry about Fang Rush death which is the biggest thing, and there are a wealth of mobs to pull; like a floor and a half of pullable colibri + wivres, as well as mamool waves.
The only thing I can think of that could maybe consistently put Skoffin Camp at the 35-45k/hr mark would probably be the presence of an epic War/Nin. Maybe something like a very well geared and skilled Ridill or Bravura, would be enough to reduce fang rushes while maintaining peak exp/hr.
4 General words of advice for people who wanna take it above the 25-30k/hr level but haven't yet,
*If you're stuck at the 25k/hr mark after corsair's roll, /nin's is probably what's holding you back
*Kill Wivres
*Consider War/Nin again if you can't get past the 35k/hr mark at Skoffin Pit, for reasons stated above.
*When you get to the 30k/hr+ mark, the Corsair's optimal role in the party is that of a secondary puller/crowd controller. Not DPS. Not /whm aid. If they happen to have TP saved up, they should probably save it only for Wivres, as for some reason Corsairs can put out consistent Slugs for upwards to 2k+ dmg when boiling blood is up.