Actualy, PLD is fine for BCNM 40. My first set up was SAM THF PLD WHM BLM BRD and we only lost our first two attempts.
BCNM 40 Steamed Sprouts pretty much comes down to a good BRD and a good WHM.
Depending on how you divide the loot, you can make a lot of gil.
When I went we would all divide the profit from all the runs between the 6 members.
The only problem with this is eventualy someone is going to want cherity. A WHM will need erase, A NIN will need Utsusemi, or a RDM will need Phalanx, and everyone will get a little less gil.
The BCNM 60 Celery is pretty tough mosh. You have 4 ghosts to chose from and only 3 people to fight it. Each ghost is weak to something different so you need to know which ghost to chose depending on your party config. From experience, go with a NIN tank if you can, and pick a Melee weak mob.
When I tried it 2 times, we kept picking the one that was weak to magic, and as a MNK tank, I was getting pwnd.
I recomend asking your friend that is doing the BCNM to let you join on the next trip. If not, look for a 40BRD, chances are he/she already has a group he goes with, and may be more than happy to sub you in for a trip or two (For a small cut in on the lewt I'm sure)