Before I say anything, I'll let it be known that my experiences with BST in regular party WILL differ from first job BST's or people who haven't merited it. I have level 6 axe upgrades and 3 crit, which does help a lot.
Ok, so ya... I just got out of a 6500 an hour party on my BST. Setup was WAR WAR NIN BST BRD RDM. Sadly, the reason the party wasn't doing like 9k an hour or so was the rdm and brd. BRD would wait until mobs were at 25% to hit us with spells, and RDM just plain sucked.
Anyways, to dispel some rumors...
No, carrie does NOT die within minutes of calling him. We were exping in moon (71-73 pt) on both golems and weapons. Out of the 3 hour party my crab died ONCE. And this once was when our puller was jerkin off or something so I pulled the golem with my crab, then it spammed AoE's.
BST rampage really isn't THAT bad. On average I was doing 500-600, while the war's were doing well uh... 500-600. The highest war rampage was just over 1100 and only once, the other highest being just under 800. My highest rampage was 859 or so.
Carrie is a GOOD dd. As BST/NIN carrie swings twice for my two swings and is about as accurate as me. Basically what that means is I'm gauranteed to get 4 swings of damage off (only 2 of tp ; ; ) per round of axes because carrie was hitting between 50- 70. My axes were doing on average 70-90, but still. Close enough.
In conclusion... I will not deny the fact that WAR and MNK can and do rape BST in exp. However, when compared to the lesser dd's (thf, drg, drk) BST is on par, if not above them. Give BST an invite and try it yourself if you don't beleive me, they do very well.